CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Real estate, net	$ 289,300	$ 289,728	$ 302,609	$ 295,631	$ 285,429	$ 275,674
Cash and cash equivalents	1,381	4,310	917	2,169	5,034	6,515	$ 9,196
Restricted cash	14,232	20,535	11,732	7,626	6,694	9,554	9,474
Prepaid expenses and other assets, net	5,007	4,126	3,555	2,934	3,343	2,703
Investments in unconsolidated joint ventures	18,517	17,938	18,056	18,318	18,814	19,379
Receivables	60	84	79	146	919	966
Deferred rents receivable	118	114	110	106	102	90
Right-of-use asset	1,224	1,314	1,374	1,389	1,478	1,565
Intangible assets, net	8,247	8,432	8,617	8,802	8,987	9,172
Total assets	338,086	346,581	347,049	337,121	330,800	325,618
LIABILITIES
Loans payable, net	210,768	219,249	223,503	215,193	207,317	197,330
Corporate credit facility, net	33,090	32,844	32,597	32,351	32,104	31,858
Secured line of credit, net	12,750	12,750	11,950	8,950	8,950	7,747
Note payable	5,863	5,863	5,863	5,863	5,863	5,863
Accounts payable and accrued expenses	19,876	17,864	18,457	17,458	14,368	15,896
Lease liability	1,347	1,447	1,516	1,536	1,626	1,716
Warrant liability	1,515	1,146	1,411	3,129	3,196	830
Total liabilities	285,209	291,163	295,297	284,480	273,424	261,240
Commitments and Contingencies
STOCKHOLDERS' EQUITY
Special stock, $0.01 par value; 1 share authorized, issued and outstanding at March 31, 2022 and December 31, 2021
Common stock, $0.01 par value; 79,999,997 shares authorized; 43,387,563 and 43,024,424 shares issued at March 31, 2022 and December 31, 2021, respectively; 36,836,146 and 36,626,549 shares outstanding at March 31, 2022 and December 31, 2021, respectively	434	430	390	389	388	383
Additional paid-in capital	144,451	144,282	136,672	136,329	136,151	135,978
Treasury stock (6,551,447 and 6,397,875 shares at March 31, 2022 and December 31, 2021, respectively)	(57,461)	(57,166)	(57,166)	(57,166)	(57,166)	(56,791)
Accumulated other comprehensive loss	(1,224)	(1,343)	(1,803)	(1,922)	(2,040)	(2,159)
Accumulated deficit	(33,323)	(30,785)	(26,341)	(24,989)	(19,957)	(13,033)
Total stockholders' equity	52,877	55,418	51,752	52,641	57,376	64,378	$ 57,792
Total liabilities and stockholders' equity	$ 338,086	346,581	347,049	337,121	330,800	325,618
Blank Check Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value