Schedule III - Real Estate and Accumulated Depreciation (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) ApartmentUnit	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Real Estate And Accumulated Depreciation Abstract
Accumulated Depreciation	$ (8,354,282,000)	$ (7,859,657,000)	$ (7,276,786,000)	$ (6,696,281,000)
100 K Apartments (fka 100K Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	222
Initial Cost to Company, Land	$ 15,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	70,296,069
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	80,503
Gross Amount Carried at close of period 12/31/2021, Land	15,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,376,572
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,976,572
Accumulated Depreciation	(9,006,912)
Investment in Real Estate, Net	76,969,660
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
140 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 103,539,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,082,725
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,259,577
Gross Amount Carried at close of period 12/31/2021, Land	103,539,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	105,342,302
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	208,881,402
Accumulated Depreciation	(60,169,233)
Investment in Real Estate, Net	148,712,169
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
160 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	455
Initial Cost to Company, Land	$ 139,933,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	190,964,745
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,648,569
Gross Amount Carried at close of period 12/31/2021, Land	139,933,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	209,613,314
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	349,546,814
Accumulated Depreciation	(119,792,673)
Investment in Real Estate, Net	229,754,141
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
170 Amsterdam [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	236
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	112,096,955
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	758,783
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	112,855,738
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,855,738
Accumulated Depreciation	(29,560,885)
Investment in Real Estate, Net	83,294,853
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
175 Kent [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 22,037,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,962,169
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,645,841
Gross Amount Carried at close of period 12/31/2021, Land	22,037,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,608,010
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	78,645,841
Accumulated Depreciation	(22,155,198)
Investment in Real Estate, Net	56,490,643
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
180 Montague (fka Brooklyn Heights) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	193
Initial Cost to Company, Land	$ 32,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	92,675,228
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,658,812
Gross Amount Carried at close of period 12/31/2021, Land	32,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	98,334,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	130,734,040
Accumulated Depreciation	(34,293,888)
Investment in Real Estate, Net	96,440,152
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
180 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	516
Initial Cost to Company, Land	$ 144,968,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	138,346,681
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,787,240
Gross Amount Carried at close of period 12/31/2021, Land	144,968,250
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	158,133,921
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	303,102,171
Accumulated Depreciation	(89,675,680)
Investment in Real Estate, Net	213,426,491
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1210 Mass [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 9,213,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,559,189
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,143,076
Gross Amount Carried at close of period 12/31/2021, Land	9,213,512
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,702,265
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,915,777
Accumulated Depreciation	(23,095,902)
Investment in Real Estate, Net	26,819,875
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1401 Joyce on Pentagon Row [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	326
Initial Cost to Company, Land	$ 9,780,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,668,165
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,800,708
Gross Amount Carried at close of period 12/31/2021, Land	9,780,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,468,873
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,248,873
Accumulated Depreciation	(44,718,792)
Investment in Real Estate, Net	60,530,081
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1500 Mass Ave [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	556
Initial Cost to Company, Land	$ 54,638,298
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,361,702
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,093,200
Gross Amount Carried at close of period 12/31/2021, Land	54,638,298
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,454,902
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,093,200
Accumulated Depreciation	(33,979,290)
Investment in Real Estate, Net	78,113,910
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1800 Oak (fka Rosslyn) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	314
Initial Cost to Company, Land	$ 31,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	109,005,734
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,759,712
Gross Amount Carried at close of period 12/31/2021, Land	31,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	119,765,446
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	151,165,446
Accumulated Depreciation	(42,105,522)
Investment in Real Estate, Net	109,059,924
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2201 Pershing Drive [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	188
Initial Cost to Company, Land	$ 11,321,198
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	49,674,175
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,031,770
Gross Amount Carried at close of period 12/31/2021, Land	11,321,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,705,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,027,143
Accumulated Depreciation	(19,161,188)
Investment in Real Estate, Net	44,865,955
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2201 Wilson [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	219
Initial Cost to Company, Land	$ 21,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,724,663
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,665,866
Gross Amount Carried at close of period 12/31/2021, Land	21,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,390,529
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	107,290,529
Accumulated Depreciation	(29,690,417)
Investment in Real Estate, Net	77,600,112
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2400 M St [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	359
Initial Cost to Company, Land	$ 30,006,593
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,013,785
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,972,552
Gross Amount Carried at close of period 12/31/2021, Land	30,006,593
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	118,986,337
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,992,930
Accumulated Depreciation	(65,723,407)
Investment in Real Estate, Net	83,269,523
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
315 on A [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 14,450,070
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	115,824,930
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,553,517
Gross Amount Carried at close of period 12/31/2021, Land	14,450,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	117,378,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	131,828,517
Accumulated Depreciation	(31,402,367)
Investment in Real Estate, Net	100,426,150
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
340 Fremont (fka Rincon Hill) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	348
Initial Cost to Company, Land	$ 42,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	248,607,902
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	501,737
Gross Amount Carried at close of period 12/31/2021, Land	42,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	249,109,639
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	291,109,639
Accumulated Depreciation	(52,713,886)
Investment in Real Estate, Net	238,395,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
341 Nevins [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 3,621,717
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	299,143
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	3,621,717
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	299,143
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	3,920,860
Accumulated Depreciation	0
Investment in Real Estate, Net	3,920,860
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
3003 Van Ness (fka Van Ness) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	625
Initial Cost to Company, Land	$ 56,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	141,191,580
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,574,525
Gross Amount Carried at close of period 12/31/2021, Land	56,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	150,766,105
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	207,066,105
Accumulated Depreciation	(54,530,411)
Investment in Real Estate, Net	152,535,694
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
425 Mass [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	559
Initial Cost to Company, Land	$ 28,150,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	138,600,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,876,074
Gross Amount Carried at close of period 12/31/2021, Land	28,150,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	145,476,074
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,626,074
Accumulated Depreciation	(63,089,507)
Investment in Real Estate, Net	110,536,567
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
455 Eye Street [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 11,941,407
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,418,689
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	133,247
Gross Amount Carried at close of period 12/31/2021, Land	11,941,407
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,551,936
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,493,343
Accumulated Depreciation	(10,963,269)
Investment in Real Estate, Net	62,530,074
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
4th and Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 13,131,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,868,544
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	13,131,456
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	1,868,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,000,000
Accumulated Depreciation	0
Investment in Real Estate, Net	15,000,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
55 West Fifth I & II (fka Townhouse Plaza and Gardens) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 21,041,710
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	71,931,323
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,165,469
Gross Amount Carried at close of period 12/31/2021, Land	21,041,710
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	87,096,792
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,138,502
Accumulated Depreciation	(36,196,476)
Investment in Real Estate, Net	71,942,026
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
600 Washington [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	135
Initial Cost to Company, Land	$ 32,852,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,140,551
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,632,257
Gross Amount Carried at close of period 12/31/2021, Land	32,852,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,772,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	79,624,808
Accumulated Depreciation	(25,544,371)
Investment in Real Estate, Net	54,080,437
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
660 Washington (fka Boston Common) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	420
Initial Cost to Company, Land	$ 106,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	166,311,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,878,053
Gross Amount Carried at close of period 12/31/2021, Land	106,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,189,732
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	284,289,732
Accumulated Depreciation	(59,198,371)
Investment in Real Estate, Net	225,091,361
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
70 Greene [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	480
Initial Cost to Company, Land	$ 28,108,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	236,763,553
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,657,362
Gross Amount Carried at close of period 12/31/2021, Land	28,108,899
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	241,420,915
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	269,529,814
Accumulated Depreciation	(98,364,599)
Investment in Real Estate, Net	171,165,215
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
71 Broadway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	238
Initial Cost to Company, Land	$ 22,611,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,492,171
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	20,626,142
Gross Amount Carried at close of period 12/31/2021, Land	22,611,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	98,118,313
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	120,729,913
Accumulated Depreciation	(59,615,389)
Investment in Real Estate, Net	61,114,524
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
77 Bluxome [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 5,249,124
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,609,876
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	604,943
Gross Amount Carried at close of period 12/31/2021, Land	5,249,124
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,214,819
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,463,943
Accumulated Depreciation	(7,624,709)
Investment in Real Estate, Net	16,839,234
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
77 Park Avenue (fka Hoboken) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 27,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	168,992,440
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,369,855
Gross Amount Carried at close of period 12/31/2021, Land	27,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	179,362,295
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	207,262,295
Accumulated Depreciation	(60,865,749)
Investment in Real Estate, Net	146,396,546
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
777 Sixth [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	294
Initial Cost to Company, Land	$ 65,352,706
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,747,294
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,035,138
Gross Amount Carried at close of period 12/31/2021, Land	65,352,706
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	71,782,432
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,135,138
Accumulated Depreciation	(35,483,508)
Investment in Real Estate, Net	101,651,630
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
88 Hillside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Daly City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	95
Initial Cost to Company, Land	$ 7,786,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,587,325
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,723,049
Gross Amount Carried at close of period 12/31/2021, Land	7,786,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,310,374
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,097,174
Accumulated Depreciation	(14,208,098)
Investment in Real Estate, Net	28,889,076
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
855 Brannan [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	449
Initial Cost to Company, Land	$ 41,363,921
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	282,738,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	420,418
Gross Amount Carried at close of period 12/31/2021, Land	41,363,921
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	283,158,742
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	324,522,663
Accumulated Depreciation	(46,006,671)
Investment in Real Estate, Net	278,515,992
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
929 Mass (fka 929 House) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	127
Initial Cost to Company, Land	$ 3,252,993
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,745,595
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,984,103
Gross Amount Carried at close of period 12/31/2021, Land	3,252,993
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,729,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,982,691
Accumulated Depreciation	(22,259,777)
Investment in Real Estate, Net	11,722,914
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Academy Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	North Hollywood, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	248
Initial Cost to Company, Land	$ 25,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,593,194
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,983,148
Gross Amount Carried at close of period 12/31/2021, Land	25,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,576,342
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,576,342
Accumulated Depreciation	(22,857,050)
Investment in Real Estate, Net	37,719,292
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Acappella [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	143
Initial Cost to Company, Land	$ 5,839,548
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,360,452
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,459,547
Gross Amount Carried at close of period 12/31/2021, Land	5,839,548
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,819,999
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,659,547
Accumulated Depreciation	(14,549,362)
Investment in Real Estate, Net	23,110,185
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alban Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	229
Initial Cost to Company, Land	$ 18,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,794,201
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,420,013
Gross Amount Carried at close of period 12/31/2021, Land	18,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	97,214,214
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,114,214
Accumulated Depreciation	(33,052,284)
Investment in Real Estate, Net	83,061,930
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alborada [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fremont, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	442
Initial Cost to Company, Land	$ 24,310,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,214,129
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,938,962
Gross Amount Carried at close of period 12/31/2021, Land	24,310,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,153,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,463,091
Accumulated Depreciation	(49,918,901)
Investment in Real Estate, Net	43,544,190
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alcott Apartments (fka West End Tower) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	470
Initial Cost to Company, Land	$ 10,424,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	387,714,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	36,889
Gross Amount Carried at close of period 12/31/2021, Land	10,424,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	387,750,979
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	398,174,979
Accumulated Depreciation	(2,677,353)
Investment in Real Estate, Net	395,497,626
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Altitude (fka Village at Howard Hughes, The (Lots 1 & 2)) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	545
Initial Cost to Company, Land	$ 43,783,485
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	150,234,305
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	678,439
Gross Amount Carried at close of period 12/31/2021, Land	43,783,485
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	150,912,744
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	194,696,229
Accumulated Depreciation	(32,898,128)
Investment in Real Estate, Net	161,798,101
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alton, The (fka Millikan) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	344
Initial Cost to Company, Land	$ 11,049,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,523,928
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	322,646
Gross Amount Carried at close of period 12/31/2021, Land	11,049,027
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	96,846,574
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	107,895,601
Accumulated Depreciation	(19,309,890)
Investment in Real Estate, Net	88,585,711
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Arbor Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	175
Initial Cost to Company, Land	$ 9,057,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,483,642
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,379,831
Gross Amount Carried at close of period 12/31/2021, Land	9,057,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,863,473
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,920,773
Accumulated Depreciation	(21,254,285)
Investment in Real Estate, Net	18,666,488
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Arches,The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	410
Initial Cost to Company, Land	$ 26,650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	62,850,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,419,103
Gross Amount Carried at close of period 12/31/2021, Land	26,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,269,103
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,919,103
Accumulated Depreciation	(29,273,217)
Investment in Real Estate, Net	64,645,886
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Artisan on Second [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	118
Initial Cost to Company, Land	$ 8,000,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,074,600
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,450,981
Gross Amount Carried at close of period 12/31/2021, Land	8,000,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,525,581
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,525,981
Accumulated Depreciation	(15,416,946)
Investment in Real Estate, Net	30,109,035
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Artistry Emeryville (fka Emeryville) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Emeryville, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	267
Initial Cost to Company, Land	$ 12,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,466,267
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,257,635
Gross Amount Carried at close of period 12/31/2021, Land	12,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,723,902
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	82,023,902
Accumulated Depreciation	(26,696,773)
Investment in Real Estate, Net	55,327,129
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Atelier [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	120
Initial Cost to Company, Land	$ 32,401,680
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,135,432
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	681,890
Gross Amount Carried at close of period 12/31/2021, Land	32,401,680
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,817,322
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	80,219,002
Accumulated Depreciation	(12,033,060)
Investment in Real Estate, Net	68,185,942
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Avenue Two [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	123
Initial Cost to Company, Land	$ 7,995,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,005,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,841,937
Gross Amount Carried at close of period 12/31/2021, Land	7,995,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,846,937
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,841,937
Accumulated Depreciation	(9,223,132)
Investment in Real Estate, Net	19,618,805
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Axis at Shady Grove [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rockville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	366
Initial Cost to Company, Land	$ 14,745,774
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	90,503,831
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	376,262
Gross Amount Carried at close of period 12/31/2021, Land	14,745,774
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,880,093
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,625,867
Accumulated Depreciation	(15,555,350)
Investment in Real Estate, Net	90,070,517
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Azure (fka Mission Bay-Block 13) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	273
Initial Cost to Company, Land	$ 32,855,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	153,566,841
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	893,636
Gross Amount Carried at close of period 12/31/2021, Land	32,855,115
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	154,460,477
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	187,315,592
Accumulated Depreciation	(36,744,242)
Investment in Real Estate, Net	150,571,350
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bay Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Long Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	160
Initial Cost to Company, Land	$ 7,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,437,239
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,499,065
Gross Amount Carried at close of period 12/31/2021, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,936,304
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,536,304
Accumulated Depreciation	(19,233,962)
Investment in Real Estate, Net	20,302,342
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Beatrice, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	302
Initial Cost to Company, Land	$ 114,351,405
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	165,648,595
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,092,110
Gross Amount Carried at close of period 12/31/2021, Land	114,351,405
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	168,740,705
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	283,092,110
Accumulated Depreciation	(62,467,433)
Investment in Real Estate, Net	220,624,677
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bella Vista I, II, III Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Woodland Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	579
Initial Cost to Company, Land	$ 31,682,754
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,095,786
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,565,891
Gross Amount Carried at close of period 12/31/2021, Land	31,682,754
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	132,661,677
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	164,344,431
Accumulated Depreciation	(73,507,308)
Investment in Real Estate, Net	90,837,123
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Belle Arts Condominium Homes, LLC [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	1
Initial Cost to Company, Land	$ 63,158
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	236,157
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,098
Gross Amount Carried at close of period 12/31/2021, Land	63,158
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	238,255
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	301,413
Accumulated Depreciation	(108,223)
Investment in Real Estate, Net	193,190
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bella Fontaine [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 9,098,808
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,701,192
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,487,041
Gross Amount Carried at close of period 12/31/2021, Land	9,098,808
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,188,233
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,287,041
Accumulated Depreciation	(12,139,945)
Investment in Real Estate, Net	28,147,096
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Breakwater at Marina Del Rey [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	224
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,189,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,593,029
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,782,291
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,782,291
Accumulated Depreciation	(27,700,597)
Investment in Real Estate, Net	48,081,694
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Briarwood (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 9,991,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,247,278
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,532,523
Gross Amount Carried at close of period 12/31/2021, Land	9,991,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,779,801
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,771,301
Accumulated Depreciation	(21,134,083)
Investment in Real Estate, Net	15,637,218
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Brodie, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Westminster, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	312
Initial Cost to Company, Land	$ 8,639,904
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,256,940
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	947,949
Gross Amount Carried at close of period 12/31/2021, Land	8,639,904
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,204,889
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,844,793
Accumulated Depreciation	(12,775,088)
Investment in Real Estate, Net	76,069,705
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Brooklyner, The (fka 111 Lawrence). [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	490
Initial Cost to Company, Land	$ 40,099,922
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	221,438,631
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,655,023
Gross Amount Carried at close of period 12/31/2021, Land	40,099,922
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	227,093,654
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	267,193,576
Accumulated Depreciation	(85,848,149)
Investment in Real Estate, Net	181,345,427
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
C on Pico [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	94
Initial Cost to Company, Land	$ 17,125,766
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,074,234
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	661,321
Gross Amount Carried at close of period 12/31/2021, Land	17,125,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,735,555
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,861,321
Accumulated Depreciation	(7,175,224)
Investment in Real Estate, Net	38,686,097
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Carlyle Mill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	317
Initial Cost to Company, Land	$ 10,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	51,367,913
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,986,014
Gross Amount Carried at close of period 12/31/2021, Land	10,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,353,927
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	71,353,927
Accumulated Depreciation	(39,619,406)
Investment in Real Estate, Net	31,734,521
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Carmel Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	384
Initial Cost to Company, Land	$ 2,288,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,596,281
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,182,734
Gross Amount Carried at close of period 12/31/2021, Land	2,288,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,779,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,067,315
Accumulated Depreciation	(30,571,076)
Investment in Real Estate, Net	5,496,239
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cascade [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	477
Initial Cost to Company, Land	$ 23,751,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	149,456,311
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	145,743
Gross Amount Carried at close of period 12/31/2021, Land	23,751,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	149,602,054
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,353,618
Accumulated Depreciation	(26,437,276)
Investment in Real Estate, Net	146,916,342
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Centennial (fka Centennial Court & Centennial Tower) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	408
Initial Cost to Company, Land	$ 9,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	70,080,378
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,453,455
Gross Amount Carried at close of period 12/31/2021, Land	9,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,533,833
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,233,833
Accumulated Depreciation	(51,055,366)
Investment in Real Estate, Net	44,178,467
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Centre Club Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	412
Initial Cost to Company, Land	$ 7,436,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,014,789
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,252,175
Gross Amount Carried at close of period 12/31/2021, Land	7,436,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,266,964
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,702,964
Accumulated Depreciation	(30,268,211)
Investment in Real Estate, Net	20,434,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chelsea Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 3,397,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,289,074
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,146,126
Gross Amount Carried at close of period 12/31/2021, Land	3,397,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	12,435,200
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,832,300
Accumulated Depreciation	(9,742,785)
Investment in Real Estate, Net	6,089,515
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chloe on Madison (fka 1401 E. Madison) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 10,401,958
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,807,106
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	32,014
Gross Amount Carried at close of period 12/31/2021, Land	10,401,958
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,839,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,241,078
Accumulated Depreciation	(4,838,864)
Investment in Real Estate, Net	59,402,214
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chloe on Union (fka Chloe) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	117
Initial Cost to Company, Land	$ 14,835,571
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	39,359,650
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,970,001
Gross Amount Carried at close of period 12/31/2021, Land	14,835,571
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,329,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,165,222
Accumulated Depreciation	(8,287,738)
Investment in Real Estate, Net	48,877,484
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Church Corner [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	85
Initial Cost to Company, Land	$ 5,220,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,744,643
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,484,815
Gross Amount Carried at close of period 12/31/2021, Land	5,220,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,229,458
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,449,458
Accumulated Depreciation	(12,559,847)
Investment in Real Estate, Net	12,889,611
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Circa Fitzsimons [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 9,241,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	86,070,796
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	319,011
Gross Amount Carried at close of period 12/31/2021, Land	9,241,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,389,807
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,631,207
Accumulated Depreciation	(4,153,312)
Investment in Real Estate, Net	91,477,895
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
City Gate at Cupertino (fka Cupertino) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cupertino, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	311
Initial Cost to Company, Land	$ 40,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	95,937,046
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,939,273
Gross Amount Carried at close of period 12/31/2021, Land	40,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,876,319
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	144,276,319
Accumulated Depreciation	(37,159,709)
Investment in Real Estate, Net	107,116,610
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
City Square Bellevue (fka Bellevue) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	191
Initial Cost to Company, Land	$ 15,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,876,257
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,017,150
Gross Amount Carried at close of period 12/31/2021, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,893,407
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,993,407
Accumulated Depreciation	(16,856,049)
Investment in Real Estate, Net	44,137,358
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Clarendon, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	292
Initial Cost to Company, Land	$ 30,400,340
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	103,824,660
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,937,604
Gross Amount Carried at close of period 12/31/2021, Land	30,400,340
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	106,762,264
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,162,604
Accumulated Depreciation	(43,908,001)
Investment in Real Estate, Net	93,254,603
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cleo, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	92
Initial Cost to Company, Land	$ 6,615,467
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,829,335
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,392,656
Gross Amount Carried at close of period 12/31/2021, Land	6,615,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,221,991
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,837,458
Accumulated Depreciation	(10,957,338)
Investment in Real Estate, Net	14,880,120
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Connecticut Heights [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	518
Initial Cost to Company, Land	$ 27,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,002,295
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,168,810
Gross Amount Carried at close of period 12/31/2021, Land	27,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	125,171,105
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	152,771,105
Accumulated Depreciation	(43,749,160)
Investment in Real Estate, Net	109,021,945
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Corcoran House at DuPont Circle (fka DuPont Circle) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	138
Initial Cost to Company, Land	$ 13,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,913,113
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,679,308
Gross Amount Carried at close of period 12/31/2021, Land	13,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,592,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,092,421
Accumulated Depreciation	(11,417,114)
Investment in Real Estate, Net	33,675,307
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Courthouse Plaza [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	396
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	87,386,024
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,944,020
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,330,044
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,330,044
Accumulated Depreciation	(35,422,571)
Investment in Real Estate, Net	59,907,473
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Creekside (San Mateo) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 9,606,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,193,232
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,859,790
Gross Amount Carried at close of period 12/31/2021, Land	9,606,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,053,022
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,659,622
Accumulated Depreciation	(21,045,859)
Investment in Real Estate, Net	15,613,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cronins Landing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Waltham, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	281
Initial Cost to Company, Land	$ 32,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	85,119,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	14,041,974
Gross Amount Carried at close of period 12/31/2021, Land	32,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	99,161,298
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	131,461,298
Accumulated Depreciation	(35,545,036)
Investment in Real Estate, Net	95,916,262
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Crystal Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	181
Initial Cost to Company, Land	$ 17,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,918,975
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,182,311
Gross Amount Carried at close of period 12/31/2021, Land	17,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,101,286
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	69,301,286
Accumulated Depreciation	(19,499,819)
Investment in Real Estate, Net	49,801,467
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Dalton, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 22,947,777
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	95,334,754
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	144,951
Gross Amount Carried at close of period 12/31/2021, Land	22,947,777
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,479,705
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	118,427,482
Accumulated Depreciation	(10,821,659)
Investment in Real Estate, Net	107,605,823
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Deerwood (SD)
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	316
Initial Cost to Company, Land	$ 2,082,095
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,739,815
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,201,750
Gross Amount Carried at close of period 12/31/2021, Land	2,082,095
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,941,565
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,023,660
Accumulated Depreciation	(32,390,313)
Investment in Real Estate, Net	5,633,347
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Del Mar Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	181
Initial Cost to Company, Land	$ 7,801,824
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,948,176
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,673,335
Gross Amount Carried at close of period 12/31/2021, Land	7,801,824
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,621,511
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,423,335
Accumulated Depreciation	(20,504,751)
Investment in Real Estate, Net	28,918,584
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Eagle Canyon [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chino Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 1,808,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,274,361
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,895,689
Gross Amount Carried at close of period 12/31/2021, Land	1,808,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,170,050
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	29,978,950
Accumulated Depreciation	(23,146,239)
Investment in Real Estate, Net	6,832,711
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Edge, The (fka 4885 Edgemoor Lane) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bethesda, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	154
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,090,698
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,090,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,090,698
Accumulated Depreciation	(1,337,668)
Investment in Real Estate, Net	71,753,030
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Edgemont at Bethesda Metro [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bethesda, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	122
Initial Cost to Company, Land	$ 13,092,552
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,907,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,598,672
Gross Amount Carried at close of period 12/31/2021, Land	13,092,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,506,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,598,672
Accumulated Depreciation	(18,431,823)
Investment in Real Estate, Net	42,166,849
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Emerson Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 14,855,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	57,566,636
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	37,319,848
Gross Amount Carried at close of period 12/31/2021, Land	14,855,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,886,484
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,741,484
Accumulated Depreciation	(72,262,761)
Investment in Real Estate, Net	37,478,723
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Encore at Sherman Oaks, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sherman Oaks, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 8,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,446,003
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,699,461
Gross Amount Carried at close of period 12/31/2021, Land	8,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,145,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,845,464
Accumulated Depreciation	(13,117,331)
Investment in Real Estate, Net	25,728,133
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Eviva on Cherokee [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	274
Initial Cost to Company, Land	$ 10,507,626
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	100,037,204
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	928,435
Gross Amount Carried at close of period 12/31/2021, Land	10,507,626
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	100,965,639
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	111,473,265
Accumulated Depreciation	(14,488,506)
Investment in Real Estate, Net	96,984,759
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Flora [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	194
Initial Cost to Company, Land	$ 5,733,088
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,341,897
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,274
Gross Amount Carried at close of period 12/31/2021, Land	5,733,088
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,375,171
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,108,259
Accumulated Depreciation	(2,351,033)
Investment in Real Estate, Net	35,757,226
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Fremont Center [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fremont, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 25,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,753,114
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,432,484
Gross Amount Carried at close of period 12/31/2021, Land	25,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,185,598
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,985,598
Accumulated Depreciation	(30,713,571)
Investment in Real Estate, Net	79,272,027
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Gaithersburg Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Gaithersburg, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	400
Initial Cost to Company, Land	$ 17,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	74,678,917
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,910,339
Gross Amount Carried at close of period 12/31/2021, Land	17,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,589,256
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,089,256
Accumulated Depreciation	(26,550,891)
Investment in Real Estate, Net	70,538,365
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Gateway at Malden Center [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Malden, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	203
Initial Cost to Company, Land	$ 9,209,780
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,722,666
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,179,307
Gross Amount Carried at close of period 12/31/2021, Land	9,209,780
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,901,973
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,111,753
Accumulated Depreciation	(30,509,820)
Investment in Real Estate, Net	22,601,933
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Geary Court Yard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	165
Initial Cost to Company, Land	$ 1,722,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,471,429
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,418,695
Gross Amount Carried at close of period 12/31/2021, Land	1,722,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,890,124
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,612,524
Accumulated Depreciation	(17,437,666)
Investment in Real Estate, Net	6,174,858
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Girard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	160
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,450,328
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	987,940
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,438,268
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	103,438,268
Accumulated Depreciation	(18,672,977)
Investment in Real Estate, Net	84,765,291
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hampshire Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	259
Initial Cost to Company, Land	$ 10,806,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,335,330
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,226,550
Gross Amount Carried at close of period 12/31/2021, Land	10,806,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,561,880
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,367,880
Accumulated Depreciation	(23,198,296)
Investment in Real Estate, Net	27,169,584
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Harbor Steps [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	761
Initial Cost to Company, Land	$ 59,403,601
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	158,829,432
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	44,513,593
Gross Amount Carried at close of period 12/31/2021, Land	59,403,601
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	203,343,025
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	262,746,626
Accumulated Depreciation	(114,985,651)
Investment in Real Estate, Net	147,760,975
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hathaway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Long Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	385
Initial Cost to Company, Land	$ 2,512,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,611,912
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,153,674
Gross Amount Carried at close of period 12/31/2021, Land	2,512,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,765,586
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,278,086
Accumulated Depreciation	(30,134,333)
Investment in Real Estate, Net	10,143,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Helios (fka 2nd+Pine) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	398
Initial Cost to Company, Land	$ 18,061,674
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	206,766,901
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	312,408
Gross Amount Carried at close of period 12/31/2021, Land	18,061,674
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	207,079,309
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	225,140,983
Accumulated Depreciation	(36,567,089)
Investment in Real Estate, Net	188,573,894
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Heritage at Stone Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlington, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 10,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,808,335
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,752,471
Gross Amount Carried at close of period 12/31/2021, Land	10,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,560,806
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,360,806
Accumulated Depreciation	(20,282,031)
Investment in Real Estate, Net	26,078,775
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Heritage Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lynwood, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	197
Initial Cost to Company, Land	$ 6,895,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,983,597
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,870,503
Gross Amount Carried at close of period 12/31/2021, Land	6,895,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,854,100
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,749,100
Accumulated Depreciation	(13,956,897)
Investment in Real Estate, Net	16,792,203
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hesby [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	North Hollywood, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	308
Initial Cost to Company, Land	$ 23,299,892
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,700,108
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,729,069
Gross Amount Carried at close of period 12/31/2021, Land	23,299,892
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	105,429,177
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	128,729,069
Accumulated Depreciation	(32,170,802)
Investment in Real Estate, Net	96,558,267
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Highlands at South Plainfield [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	South Plainfield, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 10,080,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	37,526,912
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,230,733
Gross Amount Carried at close of period 12/31/2021, Land	10,080,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,757,645
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,837,645
Accumulated Depreciation	(23,217,224)
Investment in Real Estate, Net	27,620,421
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hikari [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	128
Initial Cost to Company, Land	$ 9,435,760
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,564,240
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,453,552
Gross Amount Carried at close of period 12/31/2021, Land	9,435,760
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,017,792
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,453,552
Accumulated Depreciation	(13,835,502)
Investment in Real Estate, Net	29,618,050
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hudson Crossing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	259
Initial Cost to Company, Land	$ 23,420,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,977,699
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,571,165
Gross Amount Carried at close of period 12/31/2021, Land	23,420,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,548,864
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	96,968,864
Accumulated Depreciation	(43,605,553)
Investment in Real Estate, Net	53,363,311
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hudson Pointe [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	182
Initial Cost to Company, Land	$ 5,350,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,114,074
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,229,014
Gross Amount Carried at close of period 12/31/2021, Land	5,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,343,088
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	54,693,088
Accumulated Depreciation	(30,026,653)
Investment in Real Estate, Net	24,666,435
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Huxley, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 18,775,028
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,336,651
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	105,265
Gross Amount Carried at close of period 12/31/2021, Land	18,775,028
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,441,916
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,216,944
Accumulated Depreciation	(10,326,938)
Investment in Real Estate, Net	97,890,006
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Indie Deep Ellum [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Dallas, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	231
Initial Cost to Company, Land	$ 12,253,503
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,844,734
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	35,414
Gross Amount Carried at close of period 12/31/2021, Land	12,253,503
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,880,148
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	76,133,651
Accumulated Depreciation	(2,577,427)
Investment in Real Estate, Net	73,556,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ivory Wood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bothell, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 2,732,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,888,282
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,742,943
Gross Amount Carried at close of period 12/31/2021, Land	2,732,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,631,225
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	19,364,025
Accumulated Depreciation	(9,766,422)
Investment in Real Estate, Net	9,597,603
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Jia (fka Chinatown Gateway) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 14,791,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,286,423
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,142,453
Gross Amount Carried at close of period 12/31/2021, Land	14,791,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,428,876
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,220,707
Accumulated Depreciation	(27,653,136)
Investment in Real Estate, Net	66,567,571
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Junction 47 (fka West Seattle) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	206
Initial Cost to Company, Land	$ 11,726,305
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,584,312
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	376,513
Gross Amount Carried at close of period 12/31/2021, Land	11,726,305
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,960,825
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,687,130
Accumulated Depreciation	(14,552,334)
Investment in Real Estate, Net	54,134,796
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Juniper Sandy Springs [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sandy Springs, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	230
Initial Cost to Company, Land	$ 8,668,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,965,193
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,829
Gross Amount Carried at close of period 12/31/2021, Land	8,668,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,983,022
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,651,722
Accumulated Depreciation	(622,903)
Investment in Real Estate, Net	73,028,819
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kelvin, The (fka Modera) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	194
Initial Cost to Company, Land	$ 15,521,552
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,853,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	908,796
Gross Amount Carried at close of period 12/31/2021, Land	15,521,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,762,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,283,796
Accumulated Depreciation	(17,678,084)
Investment in Real Estate, Net	63,605,712
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kilby [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Frisco, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	258
Initial Cost to Company, Land	$ 6,431,940
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,175,461
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,960
Gross Amount Carried at close of period 12/31/2021, Land	6,431,940
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,195,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,627,361
Accumulated Depreciation	(3,264,959)
Investment in Real Estate, Net	67,362,402
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Laguna Clara [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 13,642,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,684,902
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,733,754
Gross Amount Carried at close of period 12/31/2021, Land	13,642,420
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,418,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,061,076
Accumulated Depreciation	(22,548,251)
Investment in Real Estate, Net	29,512,825
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Laguna Clara II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,399,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,399,463
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	4,399,463
Accumulated Depreciation	0
Investment in Real Estate, Net	4,399,463
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Landings at Port Imperial [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	W. New York, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	276
Initial Cost to Company, Land	$ 27,246,045
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	37,741,050
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,597,064
Gross Amount Carried at close of period 12/31/2021, Land	27,246,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	54,338,114
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,584,159
Accumulated Depreciation	(37,633,786)
Investment in Real Estate, Net	43,950,373
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lane [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	217
Initial Cost to Company, Land	$ 13,142,946
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	71,939,706
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	125,613
Gross Amount Carried at close of period 12/31/2021, Land	13,142,946
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	72,065,319
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,208,265
Accumulated Depreciation	(7,428,489)
Investment in Real Estate, Net	77,779,776
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lex, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	387
Initial Cost to Company, Land	$ 21,817,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	158,778,598
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	664,071
Gross Amount Carried at close of period 12/31/2021, Land	21,817,512
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	159,442,669
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	181,260,181
Accumulated Depreciation	(21,065,903)
Investment in Real Estate, Net	160,194,278
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Liberty Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Braintree, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 5,977,504
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,749,111
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,235,368
Gross Amount Carried at close of period 12/31/2021, Land	5,977,504
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,984,479
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,961,983
Accumulated Depreciation	(22,906,485)
Investment in Real Estate, Net	18,055,498
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Liberty Tower [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	235
Initial Cost to Company, Land	$ 16,382,822
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	83,817,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,030,560
Gross Amount Carried at close of period 12/31/2021, Land	16,382,822
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,847,638
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	106,230,460
Accumulated Depreciation	(38,101,851)
Investment in Real Estate, Net	68,128,609
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lincoln Heights [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	336
Initial Cost to Company, Land	$ 5,928,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,595,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,212,156
Gross Amount Carried at close of period 12/31/2021, Land	5,928,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,807,418
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,735,818
Accumulated Depreciation	(41,040,115)
Investment in Real Estate, Net	14,695,703
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lofts at Kendall Square (fka Kendall Square) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	186
Initial Cost to Company, Land	$ 18,696,674
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,445,657
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,812,849
Gross Amount Carried at close of period 12/31/2021, Land	18,696,674
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,258,506
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,955,180
Accumulated Depreciation	(31,085,417)
Investment in Real Estate, Net	73,869,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lofts at Kendall Square ll (fka 249 Third Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	84
Initial Cost to Company, Land	$ 4,603,326
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,012,266
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,164
Gross Amount Carried at close of period 12/31/2021, Land	4,603,326
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,045,430
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,648,756
Accumulated Depreciation	(3,879,191)
Investment in Real Estate, Net	44,769,565
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Longacre House [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	293
Initial Cost to Company, Land	$ 73,170,045
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,962,510
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,230,046
Gross Amount Carried at close of period 12/31/2021, Land	73,170,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,192,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	133,362,601
Accumulated Depreciation	(30,329,437)
Investment in Real Estate, Net	103,033,164
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Longfellow Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	710
Initial Cost to Company, Land	$ 38,264,917
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	132,175,915
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	94,971,924
Gross Amount Carried at close of period 12/31/2021, Land	38,264,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	227,147,839
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	265,412,756
Accumulated Depreciation	(173,153,336)
Investment in Real Estate, Net	92,259,420
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Luna Upper Westside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	345
Initial Cost to Company, Land	$ 14,847,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,292,639
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,884
Gross Amount Carried at close of period 12/31/2021, Land	14,847,420
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	108,314,523
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	123,161,943
Accumulated Depreciation	(3,339,114)
Investment in Real Estate, Net	119,822,829
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Madox [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	131
Initial Cost to Company, Land	$ 9,679,635
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,594,205
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,254,672
Gross Amount Carried at close of period 12/31/2021, Land	9,679,635
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,848,877
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,528,512
Accumulated Depreciation	(10,085,214)
Investment in Real Estate, Net	65,443,298
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mantena [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	98
Initial Cost to Company, Land	$ 22,346,513
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,501,158
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,761,788
Gross Amount Carried at close of period 12/31/2021, Land	22,346,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,262,946
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,609,459
Accumulated Depreciation	(22,271,078)
Investment in Real Estate, Net	63,338,381
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Marina 41 (fka Marina Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	623
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	168,842,442
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,015,523
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,857,965
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	178,857,965
Accumulated Depreciation	(65,825,369)
Investment in Real Estate, Net	113,032,596
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mariposa at Playa Del Rey (fka Playa Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Playa Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 60,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,311,482
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,365,735
Gross Amount Carried at close of period 12/31/2021, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	96,677,217
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	157,577,217
Accumulated Depreciation	(35,254,658)
Investment in Real Estate, Net	122,322,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mark On 8th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 23,004,387
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	51,116,647
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	342,085
Gross Amount Carried at close of period 12/31/2021, Land	23,004,387
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,458,732
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	74,463,119
Accumulated Depreciation	(9,185,494)
Investment in Real Estate, Net	65,277,625
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Market Street Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	229
Initial Cost to Company, Land	$ 13,740,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,757,301
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,797,175
Gross Amount Carried at close of period 12/31/2021, Land	13,740,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,554,476
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,294,476
Accumulated Depreciation	(24,031,830)
Investment in Real Estate, Net	33,262,646
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Marlowe (fka Oakwood Crystal City) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 15,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,474,336
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,757,690
Gross Amount Carried at close of period 12/31/2021, Land	15,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,232,026
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,632,026
Accumulated Depreciation	(14,954,232)
Investment in Real Estate, Net	40,677,794
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Milano Lofts [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	99
Initial Cost to Company, Land	$ 8,125,216
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,378,784
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,530,389
Gross Amount Carried at close of period 12/31/2021, Land	8,125,216
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,909,173
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,034,389
Accumulated Depreciation	(11,851,749)
Investment in Real Estate, Net	28,182,640
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mill Creek [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Milpitas, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	516
Initial Cost to Company, Land	$ 12,858,693
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	57,168,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,798,964
Gross Amount Carried at close of period 12/31/2021, Land	12,858,693
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,967,467
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,826,160
Accumulated Depreciation	(46,782,863)
Investment in Real Estate, Net	42,043,297
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Milo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	319
Initial Cost to Company, Land	$ 15,957,975
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	153,099,656
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	15,957,975
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	153,099,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	169,057,631
Accumulated Depreciation	0
Investment in Real Estate, Net	169,057,631
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mosaic at Metro [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hyattsville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	260
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,580,898
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,837,346
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,418,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,418,244
Accumulated Depreciation	(27,876,865)
Investment in Real Estate, Net	33,541,379
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mountain View Redevelopment [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mountain View, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,166,909
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,166,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	2,166,909
Accumulated Depreciation	0
Investment in Real Estate, Net	2,166,909
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mozaic at Union Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 8,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,529,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,930,062
Gross Amount Carried at close of period 12/31/2021, Land	8,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,459,508
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	63,959,508
Accumulated Depreciation	(29,803,888)
Investment in Real Estate, Net	34,155,620
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Murray Hill Tower (fka Murray Hill) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 75,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,705,401
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,129,682
Gross Amount Carried at close of period 12/31/2021, Land	75,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	115,835,083
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	191,635,083
Accumulated Depreciation	(43,363,080)
Investment in Real Estate, Net	148,272,003
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Next on Sixth [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	398
Initial Cost to Company, Land	$ 52,509,906
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	136,635,650
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	605,836
Gross Amount Carried at close of period 12/31/2021, Land	52,509,906
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	137,241,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	189,751,392
Accumulated Depreciation	(18,715,038)
Investment in Real Estate, Net	171,036,354
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
North Pier at Harborside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	297
Initial Cost to Company, Land	$ 4,000,159
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,290,590
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,474,470
Gross Amount Carried at close of period 12/31/2021, Land	4,000,159
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	104,765,060
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,765,219
Accumulated Depreciation	(61,029,617)
Investment in Real Estate, Net	47,735,602
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Northglen [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	234
Initial Cost to Company, Land	$ 9,360,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,778,553
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,516,774
Gross Amount Carried at close of period 12/31/2021, Land	9,360,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,295,327
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,655,327
Accumulated Depreciation	(19,023,647)
Investment in Real Estate, Net	18,631,680
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Northpark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlingame, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	510
Initial Cost to Company, Land	$ 38,607,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,472,217
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,819,921
Gross Amount Carried at close of period 12/31/2021, Land	38,607,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,292,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	132,899,138
Accumulated Depreciation	(47,487,541)
Investment in Real Estate, Net	85,411,597
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Oak Park Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Agoura Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 3,390,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,517,274
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,111,379
Gross Amount Carried at close of period 12/31/2021, Land	3,390,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,628,653
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,019,353
Accumulated Depreciation	(36,862,704)
Investment in Real Estate, Net	9,156,649
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Oaks [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clarita, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	520
Initial Cost to Company, Land	$ 23,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,020,438
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,122,280
Gross Amount Carried at close of period 12/31/2021, Land	23,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	71,142,718
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,542,718
Accumulated Depreciation	(44,090,629)
Investment in Real Estate, Net	50,452,089
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ocean Crest [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Solana Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	146
Initial Cost to Company, Land	$ 5,111,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,910,438
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,268,993
Gross Amount Carried at close of period 12/31/2021, Land	5,111,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,179,431
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,290,631
Accumulated Depreciation	(13,263,918)
Investment in Real Estate, Net	9,026,713
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Odin (fka Tallman) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 16,807,519
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,519,515
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	170,392
Gross Amount Carried at close of period 12/31/2021, Land	16,807,519
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,689,907
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,497,426
Accumulated Depreciation	(16,311,212)
Investment in Real Estate, Net	65,186,214
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Olivian at the Realm [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lewisville, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	421
Initial Cost to Company, Land	$ 14,854,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	109,261,221
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	14,854,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	109,261,221
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	124,115,785
Accumulated Depreciation	0
Investment in Real Estate, Net	124,115,785
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
One Henry Adams [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 30,224,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	139,604,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	242,340
Gross Amount Carried at close of period 12/31/2021, Land	30,224,393
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	139,846,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	170,070,879
Accumulated Depreciation	(28,006,849)
Investment in Real Estate, Net	142,064,030
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
One India Street (fka Oakwood Boston) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	94
Initial Cost to Company, Land	$ 22,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,672,979
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,088,089
Gross Amount Carried at close of period 12/31/2021, Land	22,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,761,068
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,961,068
Accumulated Depreciation	(13,161,555)
Investment in Real Estate, Net	44,799,513
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Osprey [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	320
Initial Cost to Company, Land	$ 18,121,932
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	116,942,248
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,397
Gross Amount Carried at close of period 12/31/2021, Land	18,121,932
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	116,951,645
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	135,073,577
Accumulated Depreciation	(4,243,648)
Investment in Real Estate, Net	130,829,929
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pacific Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	430
Initial Cost to Company, Land	$ 32,250,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	110,750,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,377,323
Gross Amount Carried at close of period 12/31/2021, Land	32,250,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	113,127,323
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	145,377,323
Accumulated Depreciation	(38,719,361)
Investment in Real Estate, Net	106,657,962
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Packard Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	61
Initial Cost to Company, Land	$ 5,911,041
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,954,959
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,289,877
Gross Amount Carried at close of period 12/31/2021, Land	5,911,041
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,244,836
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,155,877
Accumulated Depreciation	(5,677,314)
Investment in Real Estate, Net	21,478,563
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc 77 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 40,504,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,025,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,360,941
Gross Amount Carried at close of period 12/31/2021, Land	40,504,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,386,620
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	65,890,620
Accumulated Depreciation	(15,823,387)
Investment in Real Estate, Net	50,067,233
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc Cameron [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	166
Initial Cost to Company, Land	$ 37,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,855,597
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,969,567
Gross Amount Carried at close of period 12/31/2021, Land	37,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,825,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,425,164
Accumulated Depreciation	(12,804,109)
Investment in Real Estate, Net	42,621,055
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc Coliseum [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	177
Initial Cost to Company, Land	$ 52,654,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,045,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,151,472
Gross Amount Carried at close of period 12/31/2021, Land	52,654,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,197,223
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,851,223
Accumulated Depreciation	(21,315,552)
Investment in Real Estate, Net	64,535,671
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc East Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	324
Initial Cost to Company, Land	$ 102,163,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,989,402
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,975,990
Gross Amount Carried at close of period 12/31/2021, Land	102,163,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	122,965,392
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	225,128,392
Accumulated Depreciation	(65,431,630)
Investment in Real Estate, Net	159,696,762
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc on Powell (fka Parkside at Emeryville) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Emeryville, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	173
Initial Cost to Company, Land	$ 16,667,059
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,468,571
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	894,344
Gross Amount Carried at close of period 12/31/2021, Land	16,667,059
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,362,915
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	83,029,974
Accumulated Depreciation	(17,329,432)
Investment in Real Estate, Net	65,700,542
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park Connecticut [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	142
Initial Cost to Company, Land	$ 13,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,087,519
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,901,025
Gross Amount Carried at close of period 12/31/2021, Land	13,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,988,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,688,544
Accumulated Depreciation	(20,895,182)
Investment in Real Estate, Net	54,793,362
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park West (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 3,033,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,302,383
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,432,822
Gross Amount Carried at close of period 12/31/2021, Land	3,033,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,735,205
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,768,705
Accumulated Depreciation	(34,282,511)
Investment in Real Estate, Net	9,486,194
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parkside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Union City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	208
Initial Cost to Company, Land	$ 6,246,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,827,453
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,549,823
Gross Amount Carried at close of period 12/31/2021, Land	6,246,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,377,276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,623,976
Accumulated Depreciation	(15,097,028)
Investment in Real Estate, Net	11,526,948
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pearl, The (WA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	80
Initial Cost to Company, Land	$ 6,972,585
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,527,415
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,256,823
Gross Amount Carried at close of period 12/31/2021, Land	6,972,585
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,784,238
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,756,823
Accumulated Depreciation	(7,499,036)
Investment in Real Estate, Net	27,257,787
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pearl MDR (fka Oakwood Marina Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	597
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	120,795,359
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,187,274
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,982,633
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,982,633
Accumulated Depreciation	(48,509,088)
Investment in Real Estate, Net	79,473,545
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pegasus [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 18,094,052
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	81,905,948
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,565,146
Gross Amount Carried at close of period 12/31/2021, Land	18,094,052
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,471,094
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,565,146
Accumulated Depreciation	(38,970,462)
Investment in Real Estate, Net	69,594,684
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portofino [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chino Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	176
Initial Cost to Company, Land	$ 3,572,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,660,994
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,142,052
Gross Amount Carried at close of period 12/31/2021, Land	3,572,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,803,046
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,375,446
Accumulated Depreciation	(15,501,829)
Investment in Real Estate, Net	6,873,617
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portofino (Val) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	216
Initial Cost to Company, Land	$ 8,640,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,487,126
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,691,443
Gross Amount Carried at close of period 12/31/2021, Land	8,640,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,178,569
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,818,569
Accumulated Depreciation	(19,742,885)
Investment in Real Estate, Net	17,075,684
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portside Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	527
Initial Cost to Company, Land	$ 22,487,006
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,842,913
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	28,946,965
Gross Amount Carried at close of period 12/31/2021, Land	22,487,006
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	125,789,878
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,276,884
Accumulated Depreciation	(98,609,366)
Investment in Real Estate, Net	49,667,518
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Potrero 1010 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	453
Initial Cost to Company, Land	$ 40,830,011
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	181,924,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,453,552
Gross Amount Carried at close of period 12/31/2021, Land	40,830,011
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	183,378,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	224,208,026
Accumulated Depreciation	(41,306,612)
Investment in Real Estate, Net	182,901,414
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prado (fka Glendale) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,977,313
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,891,346
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	74,868,659
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	74,868,659
Accumulated Depreciation	(26,817,073)
Investment in Real Estate, Net	48,051,586
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prime, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	281
Initial Cost to Company, Land	$ 34,625,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,879,740
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,109,136
Gross Amount Carried at close of period 12/31/2021, Land	34,625,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	83,988,876
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	118,613,876
Accumulated Depreciation	(38,545,149)
Investment in Real Estate, Net	80,068,727
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prism at Park Avenue South (fka 400 Park Aveue South (EQR)) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	269
Initial Cost to Company, Land	$ 76,292,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	171,771,886
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	247,225
Gross Amount Carried at close of period 12/31/2021, Land	76,292,169
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	172,019,111
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	248,311,280
Accumulated Depreciation	(45,640,216)
Investment in Real Estate, Net	202,671,064
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Promenade at Town Center I & II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	564
Initial Cost to Company, Land	$ 28,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,795,915
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,138,641
Gross Amount Carried at close of period 12/31/2021, Land	28,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,934,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,134,556
Accumulated Depreciation	(50,812,260)
Investment in Real Estate, Net	62,322,296
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Providence [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bothell, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	200
Initial Cost to Company, Land	$ 3,573,621
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,055,505
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,727,670
Gross Amount Carried at close of period 12/31/2021, Land	3,573,621
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,783,175
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,356,796
Accumulated Depreciation	(14,191,409)
Investment in Real Estate, Net	14,165,387
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Quarry Hills [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	316
Initial Cost to Company, Land	$ 26,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,411,162
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,214,690
Gross Amount Carried at close of period 12/31/2021, Land	26,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,625,852
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,525,852
Accumulated Depreciation	(32,044,955)
Investment in Real Estate, Net	84,480,897
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radiant Fairfax Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	213
Initial Cost to Company, Land	$ 7,352,547
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,018,744
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	130,731
Gross Amount Carried at close of period 12/31/2021, Land	7,352,547
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,149,475
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,502,022
Accumulated Depreciation	(3,775,097)
Investment in Real Estate, Net	66,726,925
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radius Uptown [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	372
Initial Cost to Company, Land	$ 13,644,960
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,899,084
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,896,784
Gross Amount Carried at close of period 12/31/2021, Land	13,644,960
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	123,795,868
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,440,828
Accumulated Depreciation	(19,855,000)
Investment in Real Estate, Net	117,585,828
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Red 160 (fka Redmond Way) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	250
Initial Cost to Company, Land	$ 15,546,376
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,320,010
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,795,106
Gross Amount Carried at close of period 12/31/2021, Land	15,546,376
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,115,116
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	82,661,492
Accumulated Depreciation	(25,272,790)
Investment in Real Estate, Net	57,388,702
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Redmond Court [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	206
Initial Cost to Company, Land	$ 10,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,488,745
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,730,013
Gross Amount Carried at close of period 12/31/2021, Land	10,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,218,758
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,518,758
Accumulated Depreciation	(14,009,343)
Investment in Real Estate, Net	33,509,415
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Regency Palms [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Huntington Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	310
Initial Cost to Company, Land	$ 1,857,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,713,254
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,707,710
Gross Amount Carried at close of period 12/31/2021, Land	1,857,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,420,964
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,278,364
Accumulated Depreciation	(20,984,954)
Investment in Real Estate, Net	6,293,410
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Burlington, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlington, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 20,250,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,475,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	101,854
Gross Amount Carried at close of period 12/31/2021, Land	20,250,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	114,577,377
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	134,827,377
Accumulated Depreciation	(5,817,645)
Investment in Real Estate, Net	129,009,732
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Clarendon Centre, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 10,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,812,935
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,327,794
Gross Amount Carried at close of period 12/31/2021, Land	10,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	58,140,729
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,640,729
Accumulated Depreciation	(36,876,197)
Investment in Real Estate, Net	31,764,532
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Eisenhower, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	226
Initial Cost to Company, Land	$ 6,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,585,059
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,515,216
Gross Amount Carried at close of period 12/31/2021, Land	6,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,100,275
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,600,275
Accumulated Depreciation	(25,376,674)
Investment in Real Estate, Net	21,223,601
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Empire Lakes [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rancho Cucamonga, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	467
Initial Cost to Company, Land	$ 16,345,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,080,670
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,210,962
Gross Amount Carried at close of period 12/31/2021, Land	16,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,291,632
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,636,632
Accumulated Depreciation	(44,759,994)
Investment in Real Estate, Net	52,876,638
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Fairfax Corner [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	652
Initial Cost to Company, Land	$ 15,804,057
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,129,050
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,867,418
Gross Amount Carried at close of period 12/31/2021, Land	15,804,057
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,996,468
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,800,525
Accumulated Depreciation	(50,742,107)
Investment in Real Estate, Net	42,058,418
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Mountain View (fka Mountain View) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mountain View, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 27,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,029,605
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,523,900
Gross Amount Carried at close of period 12/31/2021, Land	27,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,553,505
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,553,505
Accumulated Depreciation	(16,598,937)
Investment in Real Estate, Net	51,954,568
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Potomac Yard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	588
Initial Cost to Company, Land	$ 11,918,917
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	68,862,641
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,250,823
Gross Amount Carried at close of period 12/31/2021, Land	11,918,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,113,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	100,032,381
Accumulated Depreciation	(53,684,381)
Investment in Real Estate, Net	46,348,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Town Center I-III (WA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mill Creek, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	584
Initial Cost to Company, Land	$ 16,768,705
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,623,664
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,315,691
Gross Amount Carried at close of period 12/31/2021, Land	16,768,705
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,939,355
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,708,060
Accumulated Depreciation	(43,366,666)
Investment in Real Estate, Net	62,341,394
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rianna I & II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	156
Initial Cost to Company, Land	$ 4,430,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,298,096
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,975,735
Gross Amount Carried at close of period 12/31/2021, Land	4,430,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,273,831
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,703,831
Accumulated Depreciation	(14,608,457)
Investment in Real Estate, Net	21,095,374
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ridgewood Village I&II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	408
Initial Cost to Company, Land	$ 11,809,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,004,048
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,140,439
Gross Amount Carried at close of period 12/31/2021, Land	11,809,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,144,487
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,953,987
Accumulated Depreciation	(30,998,875)
Investment in Real Estate, Net	21,955,112
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riva Terra I (fka Redwood Shores) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	304
Initial Cost to Company, Land	$ 34,963,355
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,587,658
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,421,032
Gross Amount Carried at close of period 12/31/2021, Land	34,963,355
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	93,008,690
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,972,045
Accumulated Depreciation	(35,095,846)
Investment in Real Estate, Net	92,876,199
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riva Terra II (fka Harborside) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	149
Initial Cost to Company, Land	$ 17,136,645
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,536,531
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,141,820
Gross Amount Carried at close of period 12/31/2021, Land	17,136,645
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,678,351
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,814,996
Accumulated Depreciation	(15,663,545)
Investment in Real Estate, Net	46,151,451
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riverpark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	321
Initial Cost to Company, Land	$ 14,355,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	80,894,049
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,143,443
Gross Amount Carried at close of period 12/31/2021, Land	14,355,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,037,492
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	100,392,492
Accumulated Depreciation	(33,609,905)
Investment in Real Estate, Net	66,782,587
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rivington, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	240
Initial Cost to Company, Land	$ 34,340,640
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	112,112,152
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,260,470
Gross Amount Carried at close of period 12/31/2021, Land	34,340,640
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	116,372,622
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	150,713,262
Accumulated Depreciation	(20,226,305)
Investment in Real Estate, Net	130,486,957
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rivington II, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	736,622
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	736,622
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	736,622
Accumulated Depreciation	0
Investment in Real Estate, Net	736,622
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rosecliff II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	130
Initial Cost to Company, Land	$ 4,922,840
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,202,160
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,042,877
Gross Amount Carried at close of period 12/31/2021, Land	4,922,840
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,245,037
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,167,877
Accumulated Depreciation	(13,320,307)
Investment in Real Estate, Net	23,847,570
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sakura Crossing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	230
Initial Cost to Company, Land	$ 14,641,990
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	42,858,010
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,646,714
Gross Amount Carried at close of period 12/31/2021, Land	14,641,990
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,504,724
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,146,714
Accumulated Depreciation	(19,007,871)
Investment in Real Estate, Net	40,138,843
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Saxton [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	325
Initial Cost to Company, Land	$ 38,805,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	128,652,023
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	474,368
Gross Amount Carried at close of period 12/31/2021, Land	38,805,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	129,126,391
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	167,931,791
Accumulated Depreciation	(14,473,592)
Investment in Real Estate, Net	153,458,199
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Seventh & James [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	96
Initial Cost to Company, Land	$ 663,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,974,803
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,681,230
Gross Amount Carried at close of period 12/31/2021, Land	663,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	10,656,033
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	11,319,833
Accumulated Depreciation	(8,984,088)
Investment in Real Estate, Net	2,335,745
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sheffield Court [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	597
Initial Cost to Company, Land	$ 3,342,381
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,337,332
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,942,021
Gross Amount Carried at close of period 12/31/2021, Land	3,342,381
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,279,353
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,621,734
Accumulated Depreciation	(43,912,782)
Investment in Real Estate, Net	12,708,952
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Siena Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lake Forest, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	356
Initial Cost to Company, Land	$ 8,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,083,024
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,984,059
Gross Amount Carried at close of period 12/31/2021, Land	8,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,067,083
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	41,967,083
Accumulated Depreciation	(25,390,768)
Investment in Real Estate, Net	16,576,315
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skycrest [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 10,560,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,574,457
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,723,207
Gross Amount Carried at close of period 12/31/2021, Land	10,560,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,297,664
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,857,664
Accumulated Depreciation	(22,365,804)
Investment in Real Estate, Net	20,491,860
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyhouse South [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	320
Initial Cost to Company, Land	$ 14,182,277
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	101,913,422
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	158,435
Gross Amount Carried at close of period 12/31/2021, Land	14,182,277
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	102,071,857
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,254,134
Accumulated Depreciation	(5,725,734)
Investment in Real Estate, Net	110,528,400
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skylark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Union City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 1,781,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,731,916
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,805,074
Gross Amount Carried at close of period 12/31/2021, Land	1,781,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,536,990
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,318,590
Accumulated Depreciation	(17,322,154)
Investment in Real Estate, Net	6,996,436
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyview [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rancho Santa Margarita, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	260
Initial Cost to Company, Land	$ 3,380,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,952,863
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,350,413
Gross Amount Carried at close of period 12/31/2021, Land	3,380,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,303,276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,683,276
Accumulated Depreciation	(21,352,684)
Investment in Real Estate, Net	10,330,592
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
SoMa II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 29,406,606
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,919,806
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	29,406,606
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	5,919,806
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,326,412
Accumulated Depreciation	0
Investment in Real Estate, Net	35,326,412
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sonterra at Foothill Ranch [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foothill Ranch, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	300
Initial Cost to Company, Land	$ 7,503,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,048,507
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,366,303
Gross Amount Carried at close of period 12/31/2021, Land	7,503,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,414,810
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,918,210
Accumulated Depreciation	(23,842,813)
Investment in Real Estate, Net	14,075,397
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
South City Station (fka South San Francisco) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	368
Initial Cost to Company, Land	$ 68,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,476,861
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,779,557
Gross Amount Carried at close of period 12/31/2021, Land	68,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	87,256,418
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	156,156,418
Accumulated Depreciation	(30,685,655)
Investment in Real Estate, Net	125,470,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Southwood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Palo Alto, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	100
Initial Cost to Company, Land	$ 6,936,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,324,069
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,081,692
Gross Amount Carried at close of period 12/31/2021, Land	6,936,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,405,761
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,342,361
Accumulated Depreciation	(15,883,455)
Investment in Real Estate, Net	12,458,906
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Springline [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	136
Initial Cost to Company, Land	$ 9,163,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,910,981
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	549,328
Gross Amount Carried at close of period 12/31/2021, Land	9,163,667
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	48,460,309
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,623,976
Accumulated Depreciation	(9,997,909)
Investment in Real Estate, Net	47,626,067
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
STOA [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	237
Initial Cost to Company, Land	$ 25,326,048
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,976,031
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	496,107
Gross Amount Carried at close of period 12/31/2021, Land	25,326,048
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,472,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,798,186
Accumulated Depreciation	(11,336,753)
Investment in Real Estate, Net	94,461,433
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Summerset Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chatsworth, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 2,890,450
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,670,889
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,118,095
Gross Amount Carried at close of period 12/31/2021, Land	2,890,450
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,788,984
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,679,434
Accumulated Depreciation	(27,722,137)
Investment in Real Estate, Net	7,957,297
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ten23 (fka 500 West 23rd Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	111
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	58,881,873
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,671,777
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,553,650
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,553,650
Accumulated Depreciation	(20,445,713)
Investment in Real Estate, Net	40,107,937
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Terraces, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	117
Initial Cost to Company, Land	$ 14,087,610
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,314,151
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,658,613
Gross Amount Carried at close of period 12/31/2021, Land	14,087,610
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,972,764
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,060,374
Accumulated Depreciation	(8,712,774)
Investment in Real Estate, Net	24,347,600
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Square One [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	112
Initial Cost to Company, Land	$ 7,222,544
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,277,456
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	163,775
Gross Amount Carried at close of period 12/31/2021, Land	7,222,544
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,441,231
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,663,775
Accumulated Depreciation	(8,120,956)
Investment in Real Estate, Net	25,542,819
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Theo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	275
Initial Cost to Company, Land	$ 15,322,049
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,885,750
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	15,322,049
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,885,750
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,207,799
Accumulated Depreciation	0
Investment in Real Estate, Net	137,207,799
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Third Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	471
Initial Cost to Company, Land	$ 26,767,171
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	218,822,728
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,976,614
Gross Amount Carried at close of period 12/31/2021, Land	26,767,171
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	228,799,342
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	255,566,513
Accumulated Depreciation	(103,039,548)
Investment in Real Estate, Net	152,526,965
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Three20 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	134
Initial Cost to Company, Land	$ 7,030,766
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,005,762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,019,864
Gross Amount Carried at close of period 12/31/2021, Land	7,030,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,025,626
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,056,392
Accumulated Depreciation	(9,965,271)
Investment in Real Estate, Net	27,091,121
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Toscana [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	563
Initial Cost to Company, Land	$ 39,410,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	50,806,072
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	26,804,440
Gross Amount Carried at close of period 12/31/2021, Land	39,410,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	77,610,512
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	117,020,512
Accumulated Depreciation	(51,851,771)
Investment in Real Estate, Net	65,168,741
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Town Square at Mark Center I&II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	678
Initial Cost to Company, Land	$ 39,928,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	141,208,321
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,585,249
Gross Amount Carried at close of period 12/31/2021, Land	39,928,464
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	156,793,570
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	196,722,034
Accumulated Depreciation	(82,156,391)
Investment in Real Estate, Net	114,565,643
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Troy Boston [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	378
Initial Cost to Company, Land	$ 34,641,051
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	181,607,331
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,570,737
Gross Amount Carried at close of period 12/31/2021, Land	34,641,051
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	184,178,068
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	218,819,119
Accumulated Depreciation	(31,608,549)
Investment in Real Estate, Net	187,210,570
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Urbana (fka Market Street Landing) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	289
Initial Cost to Company, Land	$ 12,542,418
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	75,800,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,025,940
Gross Amount Carried at close of period 12/31/2021, Land	12,542,418
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,826,030
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,368,448
Accumulated Depreciation	(25,974,224)
Investment in Real Estate, Net	65,394,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Uwajimaya Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	176
Initial Cost to Company, Land	$ 8,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,188,288
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,003,692
Gross Amount Carried at close of period 12/31/2021, Land	8,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,191,980
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,991,980
Accumulated Depreciation	(15,062,661)
Investment in Real Estate, Net	21,929,319
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Veloce [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 15,322,724
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	76,176,594
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,403,261
Gross Amount Carried at close of period 12/31/2021, Land	15,322,724
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,579,855
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,902,579
Accumulated Depreciation	(28,242,511)
Investment in Real Estate, Net	65,660,068
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Venue at the Promenade [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Castle Rock, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	312
Initial Cost to Company, Land	$ 8,355,048
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	83,752,689
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	343,056
Gross Amount Carried at close of period 12/31/2021, Land	8,355,048
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,095,745
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,450,793
Accumulated Depreciation	(11,195,864)
Investment in Real Estate, Net	81,254,929
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Verde Condominium Homes (fka Mission Verde, LLC) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	108
Initial Cost to Company, Land	$ 5,190,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,679,109
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,846,760
Gross Amount Carried at close of period 12/31/2021, Land	5,190,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	14,525,869
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	19,716,569
Accumulated Depreciation	(11,767,298)
Investment in Real Estate, Net	7,949,271
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Veridian (fka Silver Spring) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Silver Spring, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	457
Initial Cost to Company, Land	$ 18,539,817
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	130,407,365
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,769,828
Gross Amount Carried at close of period 12/31/2021, Land	18,539,817
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	135,177,193
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	153,717,010
Accumulated Depreciation	(58,024,618)
Investment in Real Estate, Net	95,692,392
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Versailles [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Woodland Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	253
Initial Cost to Company, Land	$ 12,650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,656,292
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,731,475
Gross Amount Carried at close of period 12/31/2021, Land	12,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,387,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,037,767
Accumulated Depreciation	(27,656,992)
Investment in Real Estate, Net	27,380,775
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Versailles (K-Town) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	225
Initial Cost to Company, Land	$ 10,590,975
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,409,025
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,985,889
Gross Amount Carried at close of period 12/31/2021, Land	10,590,975
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,394,914
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,985,889
Accumulated Depreciation	(21,643,771)
Investment in Real Estate, Net	35,342,118
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Victor on Venice [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	115
Initial Cost to Company, Land	$ 10,350,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,433,437
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,802,294
Gross Amount Carried at close of period 12/31/2021, Land	10,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,235,731
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,585,731
Accumulated Depreciation	(19,744,025)
Investment in Real Estate, Net	28,841,706
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Villa Solana [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Laguna Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 1,665,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,985,677
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,409,554
Gross Amount Carried at close of period 12/31/2021, Land	1,665,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,395,231
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,060,331
Accumulated Depreciation	(24,244,498)
Investment in Real Estate, Net	5,815,833
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Village at Del Mar Heights, The (fka Del Mar Heights) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	168
Initial Cost to Company, Land	$ 15,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,859,396
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,812,705
Gross Amount Carried at close of period 12/31/2021, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,672,101
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,772,101
Accumulated Depreciation	(16,691,542)
Investment in Real Estate, Net	43,080,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Virginia Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	231
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	85,940,003
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,245,382
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	92,185,385
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,185,385
Accumulated Depreciation	(33,233,676)
Investment in Real Estate, Net	58,951,709
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vista 99 (fka Tasman) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	554
Initial Cost to Company, Land	$ 27,709,329
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	177,556,948
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,080,962
Gross Amount Carried at close of period 12/31/2021, Land	27,709,329
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,637,910
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	206,347,239
Accumulated Depreciation	(41,109,307)
Investment in Real Estate, Net	165,237,932
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vista Del Lago [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mission Viejo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	608
Initial Cost to Company, Land	$ 4,525,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,736,293
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,903,738
Gross Amount Carried at close of period 12/31/2021, Land	4,525,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	62,640,031
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,165,831
Accumulated Depreciation	(55,190,613)
Investment in Real Estate, Net	11,975,218
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Walden Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	232
Initial Cost to Company, Land	$ 12,448,888
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,044,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,341,555
Gross Amount Carried at close of period 12/31/2021, Land	12,448,888
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,386,003
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	69,834,891
Accumulated Depreciation	(25,275,403)
Investment in Real Estate, Net	44,559,488
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Water Park Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	362
Initial Cost to Company, Land	$ 34,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,485,859
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,902,949
Gross Amount Carried at close of period 12/31/2021, Land	34,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,388,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	155,788,808
Accumulated Depreciation	(44,465,434)
Investment in Real Estate, Net	111,323,374
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Watertown Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Watertown, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	134
Initial Cost to Company, Land	$ 16,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,074,056
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,350,073
Gross Amount Carried at close of period 12/31/2021, Land	16,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	36,424,129
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,224,129
Accumulated Depreciation	(12,910,211)
Investment in Real Estate, Net	40,313,918
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Weaver, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	250
Initial Cost to Company, Land	$ 25,405,232
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,462,470
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	25,405,232
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,462,470
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,867,702
Accumulated Depreciation	0
Investment in Real Estate, Net	94,867,702
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
West 96th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	207
Initial Cost to Company, Land	$ 84,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,055,501
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,730,725
Gross Amount Carried at close of period 12/31/2021, Land	84,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	74,786,226
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	159,586,226
Accumulated Depreciation	(28,904,295)
Investment in Real Estate, Net	130,681,931
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
West End Apartments (fka Emerson Place/CRP II) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	310
Initial Cost to Company, Land	$ 469,546
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	163,123,022
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,795,801
Gross Amount Carried at close of period 12/31/2021, Land	469,546
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	168,918,823
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	169,388,369
Accumulated Depreciation	(79,030,892)
Investment in Real Estate, Net	90,357,477
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westchester at Rockville [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rockville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 10,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,135,207
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,445,723
Gross Amount Carried at close of period 12/31/2021, Land	10,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,580,930
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,180,930
Accumulated Depreciation	(15,808,954)
Investment in Real Estate, Net	40,371,976
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westerly [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Dallas, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	331
Initial Cost to Company, Land	$ 11,958,829
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,131,722
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	11,958,829
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,131,722
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,090,551
Accumulated Depreciation	(1,663,331)
Investment in Real Estate, Net	89,427,220
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westmont [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	163
Initial Cost to Company, Land	$ 64,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,143,259
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,045,674
Gross Amount Carried at close of period 12/31/2021, Land	64,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	68,188,933
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	133,088,933
Accumulated Depreciation	(24,572,551)
Investment in Real Estate, Net	108,516,382
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	204
Initial Cost to Company, Land	$ 34,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,962,630
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,519,987
Gross Amount Carried at close of period 12/31/2021, Land	34,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,482,617
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,682,617
Accumulated Depreciation	(21,371,770)
Investment in Real Estate, Net	73,310,847
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Barrington (fka Westside Villas III) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	36
Initial Cost to Company, Land	$ 3,060,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,538,871
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,215,009
Gross Amount Carried at close of period 12/31/2021, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,753,880
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,813,880
Accumulated Depreciation	(4,739,695)
Investment in Real Estate, Net	5,074,185
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Barry (fka Westside Villas VI) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	18
Initial Cost to Company, Land	$ 1,530,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,023,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	788,195
Gross Amount Carried at close of period 12/31/2021, Land	1,530,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,811,718
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,341,718
Accumulated Depreciation	(2,659,355)
Investment in Real Estate, Net	2,682,363
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Beloit (fka Westside Villas I) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	21
Initial Cost to Company, Land	$ 1,785,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,233,254
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	828,098
Gross Amount Carried at close of period 12/31/2021, Land	1,785,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,061,352
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,846,352
Accumulated Depreciation	(2,875,530)
Investment in Real Estate, Net	2,970,822
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Bundy (fka Westside Villas II) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	23
Initial Cost to Company, Land	$ 1,955,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,541,435
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	819,978
Gross Amount Carried at close of period 12/31/2021, Land	1,955,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,361,413
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	6,316,413
Accumulated Depreciation	(3,052,276)
Investment in Real Estate, Net	3,264,137
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Butler (fka Westside Villas IV) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	36
Initial Cost to Company, Land	$ 3,060,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,539,390
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,250,519
Gross Amount Carried at close of period 12/31/2021, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,789,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,849,909
Accumulated Depreciation	(4,771,162)
Investment in Real Estate, Net	5,078,747
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Villas (fka Westside Villas V &VII) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 9,605,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,983,385
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,074,521
Gross Amount Carried at close of period 12/31/2021, Land	9,605,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,057,906
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,662,906
Accumulated Depreciation	(15,896,472)
Investment in Real Estate, Net	16,766,434
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Windridge (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Laguna Niguel, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	344
Initial Cost to Company, Land	$ 2,662,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,985,497
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,392,574
Gross Amount Carried at close of period 12/31/2021, Land	2,662,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,378,071
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,040,971
Accumulated Depreciation	(32,468,218)
Investment in Real Estate, Net	7,572,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Woodleaf [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Campbell, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	178
Initial Cost to Company, Land	$ 8,550,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,988,182
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,239,245
Gross Amount Carried at close of period 12/31/2021, Land	8,550,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,227,427
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,778,027
Accumulated Depreciation	(18,367,471)
Investment in Real Estate, Net	14,410,556
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Zephyr on the Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	193
Initial Cost to Company, Land	$ 15,637,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,960,836
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	47,523
Gross Amount Carried at close of period 12/31/2021, Land	15,637,106
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,008,359
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,645,465
Accumulated Depreciation	(3,050,772)
Investment in Real Estate, Net	102,594,693
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Management Business [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chicago, IL
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	139,672,539
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	139,672,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	139,672,539
Accumulated Depreciation	(108,884,370)
Investment in Real Estate, Net	30,788,169
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Operating Partnership [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chicago, IL
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,447,587
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	1,447,587
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	1,447,587
Accumulated Depreciation	0
Investment in Real Estate, Net	1,447,587
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Other [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	N/A
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	109,837
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	109,837
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,837
Accumulated Depreciation	(85,278)
Investment in Real Estate, Net	24,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Wholly Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	67,748
Initial Cost to Company, Land	$ 4,942,884,454
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,209,707,547
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,700,307,269
Gross Amount Carried at close of period 12/31/2021, Land	4,942,884,454
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,910,014,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,852,899,270
Accumulated Depreciation	(7,039,743,046)
Investment in Real Estate, Net	16,813,156,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1111 Belle Pre (fka The Madison) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	360
Initial Cost to Company, Land	$ 18,937,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,758,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	817,533
Gross Amount Carried at close of period 12/31/2021, Land	18,937,702
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,576,212
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	114,513,914
Accumulated Depreciation	(31,780,060)
Investment in Real Estate, Net	82,733,854
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 86,298,662
2501 Porter [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 13,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	75,271,179
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,260,524
Gross Amount Carried at close of period 12/31/2021, Land	13,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	82,531,703
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,531,703
Accumulated Depreciation	(30,707,382)
Investment in Real Estate, Net	$ 64,824,321
300 East 39th (fka East 39th) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	254
Initial Cost to Company, Land	$ 48,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,174,639
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,988,547
Gross Amount Carried at close of period 12/31/2021, Land	48,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,163,186
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	152,063,186
Accumulated Depreciation	(36,436,305)
Investment in Real Estate, Net	115,626,881
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 63,205,738
303 East 83rd (fka Camargue) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	261
Initial Cost to Company, Land	$ 79,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,122,624
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,346,139
Gross Amount Carried at close of period 12/31/2021, Land	79,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	91,468,763
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	170,868,763
Accumulated Depreciation	(34,205,778)
Investment in Real Estate, Net	$ 136,662,985
425 Broadway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	101
Initial Cost to Company, Land	$ 12,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,394,772
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,952,205
Gross Amount Carried at close of period 12/31/2021, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,346,977
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,946,977
Accumulated Depreciation	(14,054,927)
Investment in Real Estate, Net	$ 36,892,050
Alcyone [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 11,379,497
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	49,360,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,913,197
Gross Amount Carried at close of period 12/31/2021, Land	11,379,497
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,273,700
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	62,653,197
Accumulated Depreciation	(15,405,573)
Investment in Real Estate, Net	47,247,624
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,163,830
Artisan Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Northridge, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	140
Initial Cost to Company, Land	$ 7,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,537,359
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,774,707
Gross Amount Carried at close of period 12/31/2021, Land	7,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,312,066
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,312,066
Accumulated Depreciation	(14,819,685)
Investment in Real Estate, Net	15,492,381
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 35,626,749
Avanti [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Anaheim, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 12,960,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,497,683
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,270,611
Gross Amount Carried at close of period 12/31/2021, Land	12,960,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,768,294
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,728,294
Accumulated Depreciation	(13,049,192)
Investment in Real Estate, Net	22,679,102
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,044,297
Avenir Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,321,619
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,568,840
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,890,459
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	121,890,459
Accumulated Depreciation	(41,528,064)
Investment in Real Estate, Net	80,362,395
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 81,652,924
Calvert Woodley [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	136
Initial Cost to Company, Land	$ 12,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,527,379
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,920,318
Gross Amount Carried at close of period 12/31/2021, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,447,697
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,047,697
Accumulated Depreciation	(16,564,329)
Investment in Real Estate, Net	$ 42,483,368
City Pointe [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fullerton, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	183
Initial Cost to Company, Land	$ 6,863,792
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,476,208
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,386,136
Gross Amount Carried at close of period 12/31/2021, Land	6,863,792
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,862,344
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,726,136
Accumulated Depreciation	(18,504,841)
Investment in Real Estate, Net	29,221,295
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 39,624,887
Cleveland House [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	214
Initial Cost to Company, Land	$ 18,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	66,392,414
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,599,298
Gross Amount Carried at close of period 12/31/2021, Land	18,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,991,712
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,291,712
Accumulated Depreciation	(25,944,969)
Investment in Real Estate, Net	$ 66,346,743
Elevé [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	208
Initial Cost to Company, Land	$ 14,080,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,419,440
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,363,125
Gross Amount Carried at close of period 12/31/2021, Land	14,080,560
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,782,565
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	71,863,125
Accumulated Depreciation	(18,219,994)
Investment in Real Estate, Net	53,643,131
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 38,397,494
Estancia at Santa Clara (fka Santa Clara) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	450
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	123,759,804
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,394,578
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,154,382
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,154,382
Accumulated Depreciation	(45,289,007)
Investment in Real Estate, Net	$ 81,865,375
Fairchase [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	392
Initial Cost to Company, Land	$ 23,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	87,722,321
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,216,170
Gross Amount Carried at close of period 12/31/2021, Land	23,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,938,491
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,438,491
Accumulated Depreciation	(30,699,514)
Investment in Real Estate, Net	$ 82,738,977
Flats at DuPont Circle [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	306
Initial Cost to Company, Land	$ 35,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,768,198
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,462,784
Gross Amount Carried at close of period 12/31/2021, Land	35,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	113,230,982
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,430,982
Accumulated Depreciation	(37,753,595)
Investment in Real Estate, Net	$ 110,677,387
Glo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	201
Initial Cost to Company, Land	$ 16,047,023
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	48,650,963
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,090,835
Gross Amount Carried at close of period 12/31/2021, Land	16,047,023
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,741,798
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,788,821
Accumulated Depreciation	(21,760,967)
Investment in Real Estate, Net	47,027,854
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 32,704,395
Heights on Capitol Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	104
Initial Cost to Company, Land	$ 5,425,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,138,028
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,124,990
Gross Amount Carried at close of period 12/31/2021, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,263,018
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,688,018
Accumulated Depreciation	(12,467,148)
Investment in Real Estate, Net	16,220,870
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 22,586,660
Kelvin Court (fka Alta Pacific) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	132
Initial Cost to Company, Land	$ 10,752,145
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,846,856
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,083,930
Gross Amount Carried at close of period 12/31/2021, Land	10,752,145
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,930,786
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,682,931
Accumulated Depreciation	(16,927,083)
Investment in Real Estate, Net	29,755,848
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,258,149
Kenwood Mews [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burbank, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	141
Initial Cost to Company, Land	$ 14,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,662,883
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,383,683
Gross Amount Carried at close of period 12/31/2021, Land	14,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,046,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,146,566
Accumulated Depreciation	(17,007,785)
Investment in Real Estate, Net	26,138,781
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,626,316
La Terrazza at Colma Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Colma, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	155
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,251,044
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,175,723
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,426,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,426,767
Accumulated Depreciation	(23,081,823)
Investment in Real Estate, Net	22,344,944
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 25,029,507
Lindley Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Encino, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	129
Initial Cost to Company, Land	$ 5,805,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,705,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,288,945
Gross Amount Carried at close of period 12/31/2021, Land	5,805,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,993,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,798,945
Accumulated Depreciation	(12,248,777)
Investment in Real Estate, Net	21,550,168
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,042,734
Lofts 590 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	212
Initial Cost to Company, Land	$ 20,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,909,023
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,125,639
Gross Amount Carried at close of period 12/31/2021, Land	20,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,034,662
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,134,662
Accumulated Depreciation	(22,984,204)
Investment in Real Estate, Net	66,150,458
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 43,012,615
Longview Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Waltham, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	348
Initial Cost to Company, Land	$ 20,880,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	90,255,509
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,702,122
Gross Amount Carried at close of period 12/31/2021, Land	20,880,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,957,631
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	124,837,631
Accumulated Depreciation	(57,354,859)
Investment in Real Estate, Net	67,482,772
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 84,280,484
Metro on First [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 8,540,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,209,981
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,804,678
Gross Amount Carried at close of period 12/31/2021, Land	8,540,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,014,659
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,554,659
Accumulated Depreciation	(8,458,788)
Investment in Real Estate, Net	15,095,871
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 21,491,495
Moda [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	251
Initial Cost to Company, Land	$ 12,649,228
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,842,012
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,379,781
Gross Amount Carried at close of period 12/31/2021, Land	12,649,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,221,793
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	51,871,021
Accumulated Depreciation	(17,514,997)
Investment in Real Estate, Net	$ 34,356,024
Montierra (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 8,160,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,360,938
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,961,784
Gross Amount Carried at close of period 12/31/2021, Land	8,160,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,322,722
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,482,722
Accumulated Depreciation	(28,873,699)
Investment in Real Estate, Net	17,609,023
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 61,025,383
Notch [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Newcastle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	158
Initial Cost to Company, Land	$ 5,463,324
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,490,989
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	85,422
Gross Amount Carried at close of period 12/31/2021, Land	5,463,324
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,576,411
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,039,735
Accumulated Depreciation	(3,437,360)
Investment in Real Estate, Net	45,602,375
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Old Town Lofts [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	149
Initial Cost to Company, Land	$ 7,740,467
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,146,181
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,094,490
Gross Amount Carried at close of period 12/31/2021, Land	7,740,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,240,671
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,981,138
Accumulated Depreciation	(12,234,825)
Investment in Real Estate, Net	40,746,313
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 35,570,767
Olympus Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	328
Initial Cost to Company, Land	$ 14,752,034
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,335,425
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,511,615
Gross Amount Carried at close of period 12/31/2021, Land	14,752,034
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,847,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	101,599,074
Accumulated Depreciation	(53,348,127)
Investment in Real Estate, Net	48,250,947
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 94,751,556
Park Place at San Mateo (fka San Mateo) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	575
Initial Cost to Company, Land	$ 71,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	211,907,141
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,378,744
Gross Amount Carried at close of period 12/31/2021, Land	71,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	228,285,885
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	300,185,885
Accumulated Depreciation	(81,177,243)
Investment in Real Estate, Net	$ 219,008,642
Skyhouse Denver [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 13,562,331
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	126,360,318
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,107,660
Gross Amount Carried at close of period 12/31/2021, Land	13,562,331
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,467,978
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	141,030,309
Accumulated Depreciation	(20,582,877)
Investment in Real Estate, Net	120,447,432
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 74,189,118
SoMa Square Apartments (fka South Market) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	410
Initial Cost to Company, Land	$ 79,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	177,316,977
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,046,831
Gross Amount Carried at close of period 12/31/2021, Land	79,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	195,363,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	275,263,808
Accumulated Depreciation	(68,367,690)
Investment in Real Estate, Net	$ 206,896,118
Teresina [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chula Vista, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	440
Initial Cost to Company, Land	$ 28,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,916,670
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,465,472
Gross Amount Carried at close of period 12/31/2021, Land	28,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,382,142
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	98,982,142
Accumulated Depreciation	(39,200,260)
Investment in Real Estate, Net	59,781,882
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,940,000
Vantage Hollywood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	298
Initial Cost to Company, Land	$ 42,580,326
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,014,674
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,728,870
Gross Amount Carried at close of period 12/31/2021, Land	42,580,326
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	59,743,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	102,323,870
Accumulated Depreciation	(18,335,134)
Investment in Real Estate, Net	83,988,736
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,537,003
Vintage [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	300
Initial Cost to Company, Land	$ 7,059,230
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,677,762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,278,751
Gross Amount Carried at close of period 12/31/2021, Land	7,059,230
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,956,513
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,015,743
Accumulated Depreciation	(26,867,509)
Investment in Real Estate, Net	30,148,234
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 49,136,797
Vintage at 425 Broadway (fka Promenade) [Memebr]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	60
Initial Cost to Company, Land	$ 9,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,961,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,985,863
Gross Amount Carried at close of period 12/31/2021, Land	9,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,947,386
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,947,386
Accumulated Depreciation	(6,073,401)
Investment in Real Estate, Net	$ 18,873,985
West 54th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	222
Initial Cost to Company, Land	$ 60,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	48,193,837
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,900,079
Gross Amount Carried at close of period 12/31/2021, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,093,916
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,993,916
Accumulated Depreciation	(20,838,067)
Investment in Real Estate, Net	93,155,849
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 49,701,588
Portfolio/Entity Encumbrances [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	0
Accumulated Depreciation	0
Investment in Real Estate, Net	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 799,153,560
Investment in Real Estate - Wholly Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	9,113
Initial Cost to Company, Land	$ 778,637,659
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,442,658,555
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	192,940,619
Gross Amount Carried at close of period 12/31/2021, Land	778,637,659
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,635,599,174
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	3,414,236,833
Accumulated Depreciation	(1,014,105,838)
Investment in Real Estate, Net	2,400,130,995
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,959,052,708
2300 Elliott [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	92
Initial Cost to Company, Land	$ 796,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,173,725
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,998,442
Gross Amount Carried at close of period 12/31/2021, Land	796,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,172,167
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,968,967
Accumulated Depreciation	(12,907,247)
Investment in Real Estate, Net	3,061,720
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bellevue Meadows [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 4,507,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,574,814
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,405,508
Gross Amount Carried at close of period 12/31/2021, Land	4,507,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,980,322
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,487,422
Accumulated Depreciation	(15,232,652)
Investment in Real Estate, Net	8,254,770
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Canyon Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 4,869,448
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,955,063
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,338,392
Gross Amount Carried at close of period 12/31/2021, Land	4,869,448
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,293,455
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,162,903
Accumulated Depreciation	(13,111,514)
Investment in Real Estate, Net	8,051,389
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Country Oaks [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Agoura Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	256
Initial Cost to Company, Land	$ 6,105,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,561,865
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,744,470
Gross Amount Carried at close of period 12/31/2021, Land	6,105,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,306,335
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,411,335
Accumulated Depreciation	(25,320,149)
Investment in Real Estate, Net	18,091,186
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Harrison Square (fka Elliot Bay) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	166
Initial Cost to Company, Land	$ 7,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,844,345
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,184,547
Gross Amount Carried at close of period 12/31/2021, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,028,892
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,628,892
Accumulated Depreciation	(16,285,713)
Investment in Real Estate, Net	33,343,179
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lantern Cove [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	232
Initial Cost to Company, Land	$ 6,945,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,064,976
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,636,723
Gross Amount Carried at close of period 12/31/2021, Land	6,945,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,701,699
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,646,699
Accumulated Depreciation	(22,406,448)
Investment in Real Estate, Net	16,240,251
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radius Koreatown [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 32,494,154
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,645,202
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	640,890
Gross Amount Carried at close of period 12/31/2021, Land	32,494,154
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,286,092
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	117,780,246
Accumulated Depreciation	(18,649,423)
Investment in Real Estate, Net	99,130,823
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rosecliff [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	156
Initial Cost to Company, Land	$ 5,460,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,721,570
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,177,947
Gross Amount Carried at close of period 12/31/2021, Land	5,460,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,899,517
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,359,517
Accumulated Depreciation	(15,599,076)
Investment in Real Estate, Net	10,760,441
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Schooner Bay I [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	168
Initial Cost to Company, Land	$ 5,345,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,390,618
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,976,491
Gross Amount Carried at close of period 12/31/2021, Land	5,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,367,109
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,712,109
Accumulated Depreciation	(19,122,126)
Investment in Real Estate, Net	14,589,983
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Schooner Bay II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 4,550,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,064,764
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,043,955
Gross Amount Carried at close of period 12/31/2021, Land	4,550,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,108,719
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	29,658,719
Accumulated Depreciation	(16,966,296)
Investment in Real Estate, Net	12,692,423
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
St Johns West [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	297
Initial Cost to Company, Land	$ 10,097,109
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,926,778
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	23,181
Gross Amount Carried at close of period 12/31/2021, Land	10,097,109
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,949,959
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,047,068
Accumulated Depreciation	(3,613,948)
Investment in Real Estate, Net	54,433,120
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Venn at Main [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	350
Initial Cost to Company, Land	$ 26,626,497
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	151,520,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	722,931
Gross Amount Carried at close of period 12/31/2021, Land	26,626,497
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	152,243,379
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	178,869,876
Accumulated Depreciation	(27,128,523)
Investment in Real Estate, Net	151,741,353
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Virgil Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	142
Initial Cost to Company, Land	$ 5,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,216,613
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,995,308
Gross Amount Carried at close of period 12/31/2021, Land	5,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,211,921
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,711,921
Accumulated Depreciation	(11,537,883)
Investment in Real Estate, Net	13,174,038
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Partially Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	2,646
Initial Cost to Company, Land	$ 120,896,108
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	473,660,781
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	66,888,785
Gross Amount Carried at close of period 12/31/2021, Land	120,896,108
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	540,549,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	661,445,674
Accumulated Depreciation	(217,880,998)
Investment in Real Estate, Net	443,564,676
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
9th & W [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, DC
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,306,736
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,306,736
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,306,736
Accumulated Depreciation	0
Investment in Real Estate, Net	24,306,736
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,772,313
Aero Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alameda, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	200
Initial Cost to Company, Land	$ 13,107,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	100,253,427
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,272
Gross Amount Carried at close of period 12/31/2021, Land	13,107,242
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	100,286,699
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,393,941
Accumulated Depreciation	(2,386,616)
Investment in Real Estate, Net	111,007,325
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 61,662,484
Canyon Creek (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Ramon, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	268
Initial Cost to Company, Land	$ 5,425,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,812,120
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,423,666
Gross Amount Carried at close of period 12/31/2021, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,235,786
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,660,786
Accumulated Depreciation	(20,255,679)
Investment in Real Estate, Net	12,405,107
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,208,225
Wisconsin Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chevy Chase, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	432
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	172,089,355
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,873,790
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	173,963,145
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,963,145
Accumulated Depreciation	(59,910,024)
Investment in Real Estate, Net	114,053,121
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 144,049,913
Partially Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	900
Initial Cost to Company, Land	$ 18,532,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	315,461,638
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,330,728
Gross Amount Carried at close of period 12/31/2021, Land	18,532,242
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	325,792,366
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	344,324,608
Accumulated Depreciation	(82,552,319)
Investment in Real Estate, Net	261,772,289
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 232,148,309
Total Consolidated Investment in Real Estate [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	80,407
Initial Cost to Company, Land	$ 5,860,950,463
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,441,488,521
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,970,467,401
Gross Amount Carried at close of period 12/31/2021, Land	5,860,950,463
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,411,955,922
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,272,906,385
Accumulated Depreciation	(8,354,282,201)
Investment in Real Estate, Net	19,918,624,184
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 2,191,201,017