CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss attributable to common stockholders	$ (2,538)			$ (6,924)	$ (11,956)	$ (13,308)	$ (17,752)	$ 4,863
Adjustments to reconcile net loss attributable to common stockholders to net cash used in operating activities:
Depreciation and amortization and amortization of deferred finance costs	1,405			1,193	2,816	3,977	5,137	4,168
Stock-based compensation expense	123			133	265	399	530	806
Gain on sale of school condominium								(24,196)
Gain on sale of residential condominiums, net						(33)
Gain on sale of residential condominiums, net	(5)						(321)
Deferred rents receivable	(4)			(12)	(16)	(20)	(24)	(84)
Other non-cash adjustments - pension expense	119			119	238	356	816	1,015
Unrealized loss on warrants	369	$ (1,718)	$ (67)	1,977	1,910	192	(73)	(965)
Equity in net (income) loss from unconsolidated joint ventures	(746)		264	372	636	636	555	1,571
Distributions from unconsolidated joint ventures	168			194	425	686	885	1,110
Loan forgiveness					(243)	(243)
Decrease (increase) in operating assets:
Receivables	24			47	820	887	882	2,392
Prepaid expenses and other assets, net	(1,008)			(371)	(97)	(846)	(257)	190
Increase in operating liabilities:
Accounts payable and accrued expenses	1,474			1,294	3,559	5,775	3,467	(686)
Pension liabilities							(1,288)	(1,033)
Net cash used in operating activities	(619)			(1,978)	(1,643)	(1,542)	(7,443)	(10,849)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to real estate	(4,704)			(12,152)	(21,304)	(30,666)	(36,210)	(51,282)
Net proceeds from the sale of residential condominium units	5,634					1,328	22,275
Deferred real estate deposits of condominiums								1,971
Investments in unconsolidated joint ventures								(5,383)
Net cash provided by (used in) investing activities	930			(12,152)	(21,304)	(29,338)	(13,935)	(54,694)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from loans and corporate credit facility	2,390			8,980	74,486	82,318	249,984	86,361
Proceeds from secured line of credit				1,200	1,200	4,200	8,200	5,000
Payment of finance costs				(21)	(2,231)	(2,442)	(6,552)	(1,497)
Repayment of loans	(11,642)				(56,413)	(56,413)	(225,547)	(23,368)
Settlement of stock awards	(291)			(370)	(369)	(370)	(370)	(695)
Stock buy-back								(359)
Sale of common stock, net						167	7,639
Net cash (used in) provided by financing activities	(9,543)			9,789	16,673	27,460	30,154	62,942
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(9,232)			(4,341)	(6,274)	(3,420)	8,776	(2,601)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	24,845	9,795	11,728	16,069	16,069	16,069	16,069	18,670
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	15,613	12,649	9,795	11,728	9,795	12,649	24,845	16,069
CASH AND CASH EQUIVALENTS, BEGINNING PERIOD	4,310	2,169	5,034	6,515	6,515	6,515	6,515	9,196
RESTRICTED CASH, BEGINNING OF PERIOD	20,535	7,626	6,694	9,554	9,554	9,554	9,554	9,474
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	24,845	9,795	11,728	16,069	16,069	16,069	16,069	18,670
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,381	917	2,169	5,034	2,169	917	4,310	6,515
RESTRICTED CASH, END OF PERIOD	14,232	11,732	7,626	6,694	7,626	11,732	20,535	9,554
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	15,613	$ 12,649	$ 9,795	11,728	9,795	12,649	24,845	16,069
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for: Interest	3,050			4,130	8,564	13,329	16,042	15,495
Cash paid during the period for: Taxes	66			46	49	189	395	251
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued development costs included in accounts payable and accrued expenses	9,332			7,496	8,321	7,101	8,805	10,319
Capitalized amortization of deferred financing costs and warrants	617			760	1,629	2,406	3,580	2,727
Capitalized stock-based compensation expense	$ 46			$ 39	$ 85	$ 130	177	356
Loan forgiveness							$ 243
Investment in unconsolidated joint venture								$ 5,193