Schedule III Real Estate Asset and Accumulated Depreciation (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($)
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,437,841
Initial Cost to Company, Land	47,653,000
Initial Cost to Company, Buildings and Improvements	106,708,249
Initial Cost to Company, Total	154,361,249
Net Cost Capitalized Subsequent to Acquisition	1,883,301
Gross Carrying Amount, Land	47,653,000
Gross Carrying Amount, Buildings and Improvements	108,591,550
Gross Carrying Amount, Total	156,244,550
Accumulated Depreciation	3,755,709
Morrisville | North Carolina
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,198,757
Initial Cost to Company, Land	531,000
Initial Cost to Company, Buildings and Improvements	1,891,000
Initial Cost to Company, Total	2,422,000
Net Cost Capitalized Subsequent to Acquisition	88,983
Gross Carrying Amount, Land	531,000
Gross Carrying Amount, Buildings and Improvements	1,979,983
Gross Carrying Amount, Total	2,510,983
Accumulated Depreciation	$ 83,708
Date of Construction	2004
Date Acquired	Nov. 03, 2014
Cary | North Carolina
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,571,986
Initial Cost to Company, Land	1,064,000
Initial Cost to Company, Buildings and Improvements	3,301,000
Initial Cost to Company, Total	4,365,000
Net Cost Capitalized Subsequent to Acquisition	46,214
Gross Carrying Amount, Land	1,064,000
Gross Carrying Amount, Buildings and Improvements	3,347,214
Gross Carrying Amount, Total	4,411,214
Accumulated Depreciation	$ 141,441
Date of Construction	1998/2005/2006
Date Acquired	Nov. 03, 2014
Raleigh | North Carolina
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,206,165
Initial Cost to Company, Land	1,186,000
Initial Cost to Company, Buildings and Improvements	2,540,000
Initial Cost to Company, Total	3,726,000
Net Cost Capitalized Subsequent to Acquisition	57,844
Gross Carrying Amount, Land	1,186,000
Gross Carrying Amount, Buildings and Improvements	2,597,844
Gross Carrying Amount, Total	3,783,844
Accumulated Depreciation	$ 127,964
Date of Construction	1999
Date Acquired	Nov. 03, 2014
Myrtle Beach I | South Carolina
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3,343,018
Initial Cost to Company, Land	1,482,000
Initial Cost to Company, Buildings and Improvements	4,476,000
Initial Cost to Company, Total	5,958,000
Net Cost Capitalized Subsequent to Acquisition	113,317
Gross Carrying Amount, Land	1,482,000
Gross Carrying Amount, Buildings and Improvements	4,589,317
Gross Carrying Amount, Total	6,071,317
Accumulated Depreciation	$ 196,827
Date of Construction	1998/2005-2007
Date Acquired	Nov. 03, 2014
Myrtle Beach II | South Carolina
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3,117,914
Initial Cost to Company, Land	1,690,000
Initial Cost to Company, Buildings and Improvements	3,654,000
Initial Cost to Company, Total	5,344,000
Net Cost Capitalized Subsequent to Acquisition	65,715
Gross Carrying Amount, Land	1,690,000
Gross Carrying Amount, Buildings and Improvements	3,719,715
Gross Carrying Amount, Total	5,409,715
Accumulated Depreciation	$ 165,230
Date of Construction	1999/2006
Date Acquired	Nov. 03, 2014
Whittier | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 442,513
Initial Cost to Company, Land	2,730,000
Initial Cost to Company, Buildings and Improvements	2,916,875
Initial Cost to Company, Total	5,646,875
Net Cost Capitalized Subsequent to Acquisition	70,514
Gross Carrying Amount, Land	2,730,000
Gross Carrying Amount, Buildings and Improvements	2,987,389
Gross Carrying Amount, Total	5,717,389
Accumulated Depreciation	$ 109,586
Date of Construction	1989
Date Acquired	Feb. 18, 2015
La Verne | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 312,428
Initial Cost to Company, Land	1,950,000
Initial Cost to Company, Buildings and Improvements	2,036,875
Initial Cost to Company, Total	3,986,875
Net Cost Capitalized Subsequent to Acquisition	48,802
Gross Carrying Amount, Land	1,950,000
Gross Carrying Amount, Buildings and Improvements	2,085,677
Gross Carrying Amount, Total	4,035,677
Accumulated Depreciation	$ 86,027
Date of Construction	1986
Date Acquired	Jan. 23, 2015
Santa Ana | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 697,196
Initial Cost to Company, Land	4,890,000
Initial Cost to Company, Buildings and Improvements	4,006,875
Initial Cost to Company, Total	8,896,875
Net Cost Capitalized Subsequent to Acquisition	79,368
Gross Carrying Amount, Land	4,890,000
Gross Carrying Amount, Buildings and Improvements	4,086,243
Gross Carrying Amount, Total	8,976,243
Accumulated Depreciation	$ 156,474
Date of Construction	1978
Date Acquired	Feb. 05, 2015
Upland | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 467,589
Initial Cost to Company, Land	2,950,000
Initial Cost to Company, Buildings and Improvements	3,016,875
Initial Cost to Company, Total	5,966,875
Net Cost Capitalized Subsequent to Acquisition	65,035
Gross Carrying Amount, Land	2,950,000
Gross Carrying Amount, Buildings and Improvements	3,081,910
Gross Carrying Amount, Total	6,031,910
Accumulated Depreciation	$ 120,812
Date of Construction	1979
Date Acquired	Jan. 29, 2015
La Habra | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 346,125
Initial Cost to Company, Land	2,060,000
Initial Cost to Company, Buildings and Improvements	2,356,875
Initial Cost to Company, Total	4,416,875
Net Cost Capitalized Subsequent to Acquisition	29,840
Gross Carrying Amount, Land	2,060,000
Gross Carrying Amount, Buildings and Improvements	2,386,715
Gross Carrying Amount, Total	4,446,715
Accumulated Depreciation	$ 80,604
Date of Construction	1981
Date Acquired	Feb. 05, 2015
Monterey Park | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 332,019
Initial Cost to Company, Land	2,020,000
Initial Cost to Company, Buildings and Improvements	2,216,875
Initial Cost to Company, Total	4,236,875
Net Cost Capitalized Subsequent to Acquisition	51,694
Gross Carrying Amount, Land	2,020,000
Gross Carrying Amount, Buildings and Improvements	2,268,569
Gross Carrying Amount, Total	4,288,569
Accumulated Depreciation	$ 72,211
Date of Construction	1987
Date Acquired	Feb. 05, 2015
Huntington Beach | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 808,473
Initial Cost to Company, Land	5,460,000
Initial Cost to Company, Buildings and Improvements	4,856,875
Initial Cost to Company, Total	10,316,875
Net Cost Capitalized Subsequent to Acquisition	69,502
Gross Carrying Amount, Land	5,460,000
Gross Carrying Amount, Buildings and Improvements	4,926,377
Gross Carrying Amount, Total	10,386,377
Accumulated Depreciation	$ 179,856
Date of Construction	1986
Date Acquired	Feb. 05, 2015
Chico | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 136,109
Initial Cost to Company, Land	400,000
Initial Cost to Company, Buildings and Improvements	1,336,875
Initial Cost to Company, Total	1,736,875
Net Cost Capitalized Subsequent to Acquisition	25,705
Gross Carrying Amount, Land	400,000
Gross Carrying Amount, Buildings and Improvements	1,362,580
Gross Carrying Amount, Total	1,762,580
Accumulated Depreciation	$ 49,909
Date of Construction	1984
Date Acquired	Jan. 23, 2015
Lancaster | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 134,541
Initial Cost to Company, Land	200,000
Initial Cost to Company, Buildings and Improvements	1,516,875
Initial Cost to Company, Total	1,716,875
Net Cost Capitalized Subsequent to Acquisition	58,408
Gross Carrying Amount, Land	200,000
Gross Carrying Amount, Buildings and Improvements	1,575,283
Gross Carrying Amount, Total	1,775,283
Accumulated Depreciation	$ 63,952
Date of Construction	1980
Date Acquired	Jan. 29, 2015
Riverside | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 211,338
Initial Cost to Company, Land	370,000
Initial Cost to Company, Buildings and Improvements	2,326,875
Initial Cost to Company, Total	2,696,875
Net Cost Capitalized Subsequent to Acquisition	46,883
Gross Carrying Amount, Land	370,000
Gross Carrying Amount, Buildings and Improvements	2,373,758
Gross Carrying Amount, Total	2,743,758
Accumulated Depreciation	$ 85,830
Date of Construction	1985
Date Acquired	Jan. 23, 2015
Fairfield | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 288,135
Initial Cost to Company, Land	730,000
Initial Cost to Company, Buildings and Improvements	2,946,875
Initial Cost to Company, Total	3,676,875
Net Cost Capitalized Subsequent to Acquisition	28,506
Gross Carrying Amount, Land	730,000
Gross Carrying Amount, Buildings and Improvements	2,975,381
Gross Carrying Amount, Total	3,705,381
Accumulated Depreciation	$ 110,100
Date of Construction	1984
Date Acquired	Jan. 23, 2015
Lompoc | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 293,621
Initial Cost to Company, Land	1,000,000
Initial Cost to Company, Buildings and Improvements	2,746,875
Initial Cost to Company, Total	3,746,875
Net Cost Capitalized Subsequent to Acquisition	47,068
Gross Carrying Amount, Land	1,000,000
Gross Carrying Amount, Buildings and Improvements	2,793,943
Gross Carrying Amount, Total	3,793,943
Accumulated Depreciation	$ 99,532
Date of Construction	1982
Date Acquired	Feb. 05, 2015
Santa Rosa | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 773,209
Initial Cost to Company, Land	3,150,000
Initial Cost to Company, Buildings and Improvements	6,716,875
Initial Cost to Company, Total	9,866,875
Net Cost Capitalized Subsequent to Acquisition	67,778
Gross Carrying Amount, Land	3,150,000
Gross Carrying Amount, Buildings and Improvements	6,784,653
Gross Carrying Amount, Total	9,934,653
Accumulated Depreciation	$ 251,399
Date of Construction	1979-1981
Date Acquired	Jan. 29, 2015
Vallejo | California
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 990,000
Initial Cost to Company, Buildings and Improvements	3,946,875
Initial Cost to Company, Total	4,936,875
Net Cost Capitalized Subsequent to Acquisition	60,847
Gross Carrying Amount, Land	990,000
Gross Carrying Amount, Buildings and Improvements	4,007,722
Gross Carrying Amount, Total	4,997,722
Accumulated Depreciation	$ 145,671
Date of Construction	1981
Date Acquired	Jan. 29, 2015
Federal Heights | Colorado
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 348,476
Initial Cost to Company, Land	1,100,000
Initial Cost to Company, Buildings and Improvements	3,346,875
Initial Cost to Company, Total	4,446,875
Net Cost Capitalized Subsequent to Acquisition	58,584
Gross Carrying Amount, Land	1,100,000
Gross Carrying Amount, Buildings and Improvements	3,405,459
Gross Carrying Amount, Total	4,505,459
Accumulated Depreciation	$ 140,212
Date of Construction	1983
Date Acquired	Jan. 29, 2015
Aurora | Colorado
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 526,362
Initial Cost to Company, Land	810,000
Initial Cost to Company, Buildings and Improvements	5,906,875
Initial Cost to Company, Total	6,716,875
Net Cost Capitalized Subsequent to Acquisition	51,948
Gross Carrying Amount, Land	810,000
Gross Carrying Amount, Buildings and Improvements	5,958,823
Gross Carrying Amount, Total	6,768,823
Accumulated Depreciation	$ 211,718
Date of Construction	1984
Date Acquired	Feb. 05, 2015
Littleton | Colorado
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 324,183
Initial Cost to Company, Land	1,680,000
Initial Cost to Company, Buildings and Improvements	2,456,875
Initial Cost to Company, Total	4,136,875
Net Cost Capitalized Subsequent to Acquisition	27,361
Gross Carrying Amount, Land	1,680,000
Gross Carrying Amount, Buildings and Improvements	2,484,236
Gross Carrying Amount, Total	4,164,236
Accumulated Depreciation	$ 95,128
Date of Construction	1985
Date Acquired	Jan. 23, 2015
Bloomingdale | Illinois
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 365,716
Initial Cost to Company, Land	810,000
Initial Cost to Company, Buildings and Improvements	3,856,874
Initial Cost to Company, Total	4,666,874
Net Cost Capitalized Subsequent to Acquisition	47,620
Gross Carrying Amount, Land	810,000
Gross Carrying Amount, Buildings and Improvements	3,904,494
Gross Carrying Amount, Total	4,714,494
Accumulated Depreciation	$ 129,121
Date of Construction	1987
Date Acquired	Feb. 18, 2015
Crestwood | Illinois
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 183,911
Initial Cost to Company, Land	250,000
Initial Cost to Company, Buildings and Improvements	2,096,875
Initial Cost to Company, Total	2,346,875
Net Cost Capitalized Subsequent to Acquisition	100,573
Gross Carrying Amount, Land	250,000
Gross Carrying Amount, Buildings and Improvements	2,197,448
Gross Carrying Amount, Total	2,447,448
Accumulated Depreciation	$ 79,090
Date of Construction	1987
Date Acquired	Jan. 23, 2015
Forestville | Maryland
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 492,666
Initial Cost to Company, Land	1,940,000
Initial Cost to Company, Buildings and Improvements	4,346,875
Initial Cost to Company, Total	6,286,875
Net Cost Capitalized Subsequent to Acquisition	82,979
Gross Carrying Amount, Land	1,940,000
Gross Carrying Amount, Buildings and Improvements	4,429,854
Gross Carrying Amount, Total	6,369,854
Accumulated Depreciation	$ 189,219
Date of Construction	1988
Date Acquired	Jan. 23, 2015
Warren | Michigan | Property One
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 250,520
Initial Cost to Company, Land	230,000
Initial Cost to Company, Buildings and Improvements	2,966,875
Initial Cost to Company, Total	3,196,875
Net Cost Capitalized Subsequent to Acquisition	63,649
Gross Carrying Amount, Land	230,000
Gross Carrying Amount, Buildings and Improvements	3,030,524
Gross Carrying Amount, Total	3,260,524
Accumulated Depreciation	$ 75,613
Date of Construction	1996
Date Acquired	May 08, 2015
Warren | Michigan | Property Two
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 259,140
Initial Cost to Company, Land	240,000
Initial Cost to Company, Buildings and Improvements	3,066,875
Initial Cost to Company, Total	3,306,875
Net Cost Capitalized Subsequent to Acquisition	67,513
Gross Carrying Amount, Land	240,000
Gross Carrying Amount, Buildings and Improvements	3,134,388
Gross Carrying Amount, Total	3,374,388
Accumulated Depreciation	$ 79,350
Date of Construction	1987
Date Acquired	May 08, 2015
Sterling Heights | Michigan
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 277,164
Initial Cost to Company, Land	250,000
Initial Cost to Company, Buildings and Improvements	3,286,875
Initial Cost to Company, Total	3,536,875
Net Cost Capitalized Subsequent to Acquisition	60,591
Gross Carrying Amount, Land	250,000
Gross Carrying Amount, Buildings and Improvements	3,347,466
Gross Carrying Amount, Total	3,597,466
Accumulated Depreciation	$ 74,294
Date of Construction	1977
Date Acquired	May 21, 2015
Troy | Michigan
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 346,125
Initial Cost to Company, Land	240,000
Initial Cost to Company, Buildings and Improvements	4,176,875
Initial Cost to Company, Total	4,416,875
Net Cost Capitalized Subsequent to Acquisition	65,279
Gross Carrying Amount, Land	240,000
Gross Carrying Amount, Buildings and Improvements	4,242,154
Gross Carrying Amount, Total	4,482,154
Accumulated Depreciation	$ 140,058
Date of Construction	1988
Date Acquired	May 08, 2015
Beverly | New Jersey
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 164,320
Initial Cost to Company, Land	400,000
Initial Cost to Company, Buildings and Improvements	1,696,875
Initial Cost to Company, Total	2,096,875
Net Cost Capitalized Subsequent to Acquisition	26,318
Gross Carrying Amount, Land	400,000
Gross Carrying Amount, Buildings and Improvements	1,723,193
Gross Carrying Amount, Total	2,123,193
Accumulated Depreciation	$ 37,430
Date of Construction	1988
Date Acquired	May 28, 2015
Everett | Washington
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 389,225
Initial Cost to Company, Land	2,010,000
Initial Cost to Company, Buildings and Improvements	2,956,875
Initial Cost to Company, Total	4,966,875
Net Cost Capitalized Subsequent to Acquisition	50,949
Gross Carrying Amount, Land	2,010,000
Gross Carrying Amount, Buildings and Improvements	3,007,824
Gross Carrying Amount, Total	5,017,824
Accumulated Depreciation	$ 97,276
Date of Construction	1986
Date Acquired	Feb. 05, 2015
Foley | Alabama
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 596,743
Initial Cost to Company, Land	1,830,000
Initial Cost to Company, Buildings and Improvements	5,785,000
Initial Cost to Company, Total	7,615,000
Net Cost Capitalized Subsequent to Acquisition	53,850
Gross Carrying Amount, Land	1,830,000
Gross Carrying Amount, Buildings and Improvements	5,838,850
Gross Carrying Amount, Total	7,668,850
Accumulated Depreciation	$ 68,819
Date of Construction	1985/1996/2006
Date Acquired	Sep. 11, 2015
Tampa | Florida
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 232,154
Initial Cost to Company, Land	1,010,000
Initial Cost to Company, Buildings and Improvements	1,952,500
Initial Cost to Company, Total	2,962,500
Net Cost Capitalized Subsequent to Acquisition	4,064
Gross Carrying Amount, Land	1,010,000
Gross Carrying Amount, Buildings and Improvements	1,956,564
Gross Carrying Amount, Total	2,966,564
Accumulated Depreciation	$ 11,248
Date of Construction	1985
Date Acquired	Nov. 03, 2015