CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss attributable to common stockholders	$ (2,179)	$ (7,889)	$ (2,021)
Adjustments to reconcile net loss attributable to common stockholders to net cash used in operating activities:
Depreciation and amortization	2,977	2,463	544
Amortization of deferred finance costs	0	532	255
Write-off of costs relating to demolished asset	0	0	1,585
Stock-based compensation expense	905	1,269	1,225
Gain on sale of real estate	(9,521)	0	(3,853)
Deferred rents receivable	578	(36)	(5)
Other non-cash adjustments - pension expense	1,992	0	0
Equity in net loss from unconsolidated joint venture	819	728	1,057
Distribution from unconsolidated joint venture	33	280	419
Decrease (Increase) in operating assets:
Receivables	1,577	4	(3,197)
Prepaid expenses and other assets, net	278	286	(2,456)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	1,649	975	212
Pension liabilities	(2,705)	(1,283)	(1,277)
Net cash used in operating activities	(3,597)	(2,671)	(7,512)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of real estate	0	81,960	0
Additions to real estate	(91,847)	(58,909)	(16,788)
Deferred real estate deposits	33,609	49,247	0
Net proceeds from the sale of real estate	18,812	0	15,232
Investment in unconsolidated joint venture	0	0	(70)
Net cash used in investing activities	(39,426)	(91,622)	(1,626)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from loans and line of credit	62,725	87,037	32,302
Payment of finance costs	(1,531)	(1,820)	(5,328)
Repayment of loan and secured line of credit	12,557	0	40,000
Settlement of stock awards	(772)	(1,088)	(2,574)
Stock buy-back	(197)	0	0
Proceeds from sale of common stock, net	0	0	40,561
Net cash provided by financing activities	47,668	84,129	24,961
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	4,645	(10,164)	15,823
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	14,025	24,189	8,366
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	18,670	14,025	24,189
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	11,496	15,273	4,678
RESTRICTED CASH, BEGINNING OF PERIOD	2,529	8,916	3,688
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	14,025	24,189	8,366
CASH AND CASH EQUIVALENTS, END OF PERIOD	9,196	11,496	15,273
RESTRICTED CASH, END OF PERIOD	9,474	2,529	8,916
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	18,670	14,025	24,189
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for: Interest	12,631	6,969	2,467
Cash paid during the period for: Taxes	352	268	135
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued development costs included in accounts payable and accrued expenses	12,698	16,574	10,175
Capitalized amortization of deferred financing costs and lease commissions	2,737	1,986	487
Capitalized stock-based compensation expense	480	665	1,645
Right-of-use asset	(1,904)	0	0
Lease liabilities	(2,065)	0	0
Warrant liability	$ (1,795)	$ 0	$ 0