RESTATEMENT OF PREVIOUSLY ISSUED INTERIM CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) - Balance Sheet (Details) - USD ($)	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
ASSETS
Real estate, net	$ 67,334,000	$ 67,996,000	$ 68,663,000	$ 69,353,000	$ 70,040,000
Residential condominium units for sale	216,983,000	228,102,000	222,713,000	213,223,000	203,276,000
Cash and cash equivalents	4,310,000	917,000	2,169,000	5,034,000	6,515,000		$ 9,196,000		$ 11,496,000
Restricted cash	20,535,000	11,732,000	7,626,000	6,694,000	9,554,000		9,474,000		2,529,000
Prepaid expenses and other assets, net	4,126,000	3,555,000	2,934,000	3,343,000	2,703,000
Investments in unconsolidated joint ventures	17,938,000	18,056,000	18,318,000	18,814,000	19,379,000
Receivables	84,000	79,000	146,000	919,000	966,000
Deferred rents receivable	114,000	110,000	106,000	102,000	90,000
Right-of-use asset	1,314,000	1,374,000	1,389,000	1,478,000	1,565,000
Intangible assets, net	8,432,000	8,617,000	8,802,000	8,987,000	9,172,000
Total assets	341,170,000	340,538,000	332,866,000	327,947,000	323,260,000
LIABILITIES
Loans payable, net	219,249,000	223,503,000	215,193,000	207,317,000	197,330,000
Corporate credit facility, net	32,844,000	32,597,000	32,351,000	32,104,000	31,858,000
Secured line of credit, net	12,750,000	11,950,000	8,950,000	8,950,000	7,747,000
Note payable	5,863,000	5,863,000	5,863,000	5,863,000	5,863,000
Accounts payable and accrued expenses	17,864,000	18,457,000	17,458,000	14,368,000	15,896,000
Lease liability	1,447,000	1,516,000	1,536,000	1,626,000	1,716,000
Warrant liability	1,146,000	1,411,000	3,129,000	3,196,000	830,000
Total liabilities	291,163,000	295,297,000	284,480,000	273,424,000	261,240,000
Commitments and Contingencies
STOCKHOLDERS' EQUITY
Preferred stock, value
Special stock
Common stock	430,000	390,000	389,000	388,000	383,000
Additional paid-in capital	144,282,000	(136,672,000)	(136,329,000)	136,151,000	135,978,000
Treasury stock	(57,166,000)	(57,166,000)	(57,166,000)	(57,166,000)	(56,791,000)
Accumulated other comprehensive loss	(1,343,000)	(1,803,000)	(1,922,000)	(2,040,000)	(2,159,000)
Accumulated deficit	(36,196,000)	(32,852,000)	(29,244,000)	(22,810,000)	(15,391,000)
Total stockholders' equity	50,007,000	45,241,000	48,386,000	54,523,000	62,020,000	[1]	55,964,000	[1]	58,847,000
Total liabilities and stockholders' equity	341,170,000	340,538,000	332,866,000	327,947,000	323,260,000
Blank Check Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Error Related to Classification of Real Estate Under Development | As Previously Reported
ASSETS
Real estate, net	294,536,000	307,112,000	299,814,000	289,294,000	279,204,000
Cash and cash equivalents	4,310,000	917,000	2,169,000	5,034,000	6,515,000		9,196,000		11,496,000
Restricted cash	20,535,000	11,732,000	7,626,000	6,694,000	9,554,000		9,474,000		2,529,000
Prepaid expenses and other assets, net	4,126,000	3,555,000	2,934,000	3,343,000	2,703,000
Investments in unconsolidated joint ventures	17,938,000	18,056,000	18,318,000	18,814,000	19,379,000
Receivables	84,000	79,000	146,000	919,000	966,000
Deferred rents receivable	114,000	110,000	106,000	102,000	90,000
Right-of-use asset	1,314,000	1,374,000	1,389,000	1,478,000	1,565,000
Intangible assets, net	8,432,000	8,617,000	8,802,000	8,987,000	9,172,000
Total assets	351,389,000	351,552,000	341,304,000	334,665,000	329,148,000
LIABILITIES
Loans payable, net	219,249,000	223,503,000	215,193,000	207,317,000	197,330,000
Corporate credit facility, net	32,844,000	32,597,000	32,351,000	32,104,000	31,858,000
Secured line of credit, net	12,750,000	11,950,000	8,950,000	8,950,000	7,747,000
Note payable	5,863,000	5,863,000	5,863,000	5,863,000	5,863,000
Accounts payable and accrued expenses	17,864,000	18,457,000	17,458,000	14,368,000	15,896,000
Lease liability	1,447,000	1,516,000	1,536,000	1,626,000	1,716,000
Warrant liability	1,146,000	1,411,000	3,129,000	3,196,000	830,000
Total liabilities	291,163,000	295,297,000	284,480,000	273,424,000	261,240,000
Commitments and Contingencies
STOCKHOLDERS' EQUITY
Preferred stock, value
Special stock
Common stock	430,000	390,000	389,000	388,000	383,000
Additional paid-in capital	144,282,000	(136,672,000)	(136,329,000)	136,151,000	135,978,000
Treasury stock	(57,166,000)	(57,166,000)	(57,166,000)	(57,166,000)	(56,791,000)
Accumulated other comprehensive loss	(1,343,000)	(1,803,000)	(1,922,000)	(2,040,000)	(2,159,000)
Accumulated deficit	(25,977,000)	(21,838,000)	(20,806,000)	(16,092,000)	(9,503,000)
Total stockholders' equity	60,226,000	56,255,000	56,824,000	61,241,000	67,908,000		59,691,000		59,461,000
Total liabilities and stockholders' equity	351,389,000	351,552,000	341,304,000	334,665,000	329,148,000
Error Related to Classification of Real Estate Under Development | As Previously Reported | Blank Check Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Error Related to Classification of Real Estate Under Development | As Previously Reported | Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Error Related to Classification of Real Estate Under Development | Revision/Restatement Impact
ASSETS
Real estate, net	(227,202,000)	(239,116,000)	(231,151,000)	(219,941,000)	(209,164,000)
Residential condominium units for sale	216,983,000	228,102,000	222,713,000	213,223,000	203,276,000
Total assets	(10,219,000)	(11,014,000)	(8,438,000)	(6,718,000)	(5,888,000)
LIABILITIES
Commitments and Contingencies
STOCKHOLDERS' EQUITY
Preferred stock, value
Special stock
Accumulated deficit	(10,219,000)	(11,014,000)	(8,438,000)	(6,718,000)	(5,888,000)
Total stockholders' equity	(10,219,000)	(11,014,000)	(8,438,000)	(6,718,000)	(5,888,000)		$ (3,727,000)		$ (614,000)
Total liabilities and stockholders' equity	$ (10,219,000)	(11,014,000)	(8,438,000)	(6,718,000)	(5,888,000)
Error Related to Classification of Real Estate Under Development | Revision/Restatement Impact | Blank Check Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value
Error Related to Classification of Real Estate Under Development | Revision/Restatement Impact | Preferred Stock
STOCKHOLDERS' EQUITY
Preferred stock, value

[1] Amounts are revised. See Note 3 for more information.