Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (1,256)		$ 291,623
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent and amortization of intangible assets, liabilities and lease inducements	(816)		(193)
Depreciation and amortization	5,258		9,630
Reclassification from AOCI to interest expense	0		(1,806)
Reclassification from other assets to interest expense for swap termination	0		1,421
Change in fair value of swaps	0		209
Gain on sale of real estate	0		(377,581)
Impairment of real estate	0	$ 2,800	66,200
Loss on early extinguishment of debt	0		25,071
Amortization of deferred loan costs	266		309
Amortization of premiums and discounts on debt	(25)		4
Unrealized premium adjustment	451		442
Amortization and accretion on loans receivable, net	(179)		(98)
Bad debt expense (recovery)	225		(98)
Deferred income taxes	(151)		95
Stock-based compensation	56		38
Loans funded, held for sale to secondary market	(8,883)		(2,553)
Proceeds from sale of guaranteed loans	9,520		11,286
Principal collected on loans subject to secured borrowings	2,014		112
Other operating activity	(297)		(49)
Changes in operating assets and liabilities:
Accounts receivable and interest receivable	(300)		740
Other assets	(695)		643
Accounts payable and accrued expenses	489		(4,041)
Deferred leasing costs	(83)		(262)
Other liabilities	(497)		(5,026)
Due to related parties	886		(1,723)
Net cash provided by operating activities	5,983		14,393
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to investments in real estate	(5,632)		(12,623)
Proceeds from sale of real estate, net	0		652,891
Loans funded	(2,961)		(851)
Principal collected on loans	3,319		2,252
Other investing activity	30		23
Net cash (used in) provided by investing activities	(5,244)		641,692
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment of unsecured revolving lines of credit, revolving credit facility and or term note	(5,000)		(130,000)
Proceeds from unsecured revolving lines of credit, revolving credit facility and or term note	11,500		0
Payment of mortgages payable	0		(46,000)
Investments in marketable securities in connection with the legal defeasance of mortgages payable	0		(224,086)
Prepayment penalties and other payments for early extinguishment of debt	0		(5,562)
Payment of principal on SBA 7(a) loan-backed notes	(4,249)		(3,271)
Payment of principal on secured borrowings	(2,014)		(112)
Payment of deferred preferred stock offering costs	(207)		(126)
Payment of other deferred costs	0		(82)
Payment of common dividends	(1,095)		(5,474)
Net proceeds from issuance of Series A Preferred Warrants	29		9
Payment of preferred stock dividends	(10,919)		(14,935)
Redemption of Series A Preferred Stock	(186)		(67)
Net cash used in by financing activities	(3,498)		(422,687)
Change in cash balances included in assets held for sale	0		10
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(2,759)		233,408
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	35,947	310,579	77,171	$ 77,171
End of period	33,188		310,579	35,947
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Cash and cash equivalents					$ 22,758	$ 23,801	$ 298,841
Restricted cash					10,430	12,146	11,738
Total cash and cash equivalents and restricted cash	33,188	$ 310,579	310,579	$ 35,947	33,188	$ 35,947	310,579
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	2,904		5,734
Federal income taxes paid	0		0
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Additions to investments in real estate included in accounts payable and accrued expenses	4,859		2,457
Additions to deferred costs included in accounts payable and accrued expenses	382		145
Additions to preferred stock offering costs included in accounts payable and accrued expenses	538		281
Accrual of dividends payable to preferred stockholders					$ 2,209		$ 1,010
Preferred stock offering costs offset against redeemable preferred stock in temporary equity	176		44
Preferred stock offering costs offset against redeemable preferred stock in permanent equity	2		0
Reclassification of Series A Preferred Stock from temporary equity to permanent equity	6,948		8,890
Reclassification of loans receivable, net to real estate owned	0		243
Reclassification of Series A Preferred Stock from permanent equity to accounts payable and accrued expenses	18		0
Establishment of right-of use asset and lease liability	0		362
Marketable securities transferred in connection with the legal defeasance of mortgages payable	0		224,086
Mortgage notes payable legally defeased	0		205,500
Mortgage note assumed in connection with our sale of real estate	0		28,200
Redeemable preferred stock deemed dividends	161		0
Redeemable preferred stock fees included in accounts payable and accrued expenses	78		0
Series A Preferred Stock
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of Series A Preferred Stock	8,497		7,019
Series D Preferred Stock
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of Series A Preferred Stock	$ 146		$ 0