Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (15,015)	$ 345,521	$ 1,142
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, net	21,085	26,608	52,230
Reclassification from AOCI to interest expense	0	(1,806)	(1,552)
Reclassification from other assets to interest expense for swap termination	0	1,421	0
Change in fair value of swaps	0	209	1,728
Gain on sale of real estate	0	(433,104)	0
Impairment of real estate	0	69,000	0
Loss on early extinguishment of debt	281	29,982	808
Amortization of deferred loan costs	1,192	1,133	896
Amortization of premiums and discounts on debt	(84)	(227)	(444)
Unrealized premium adjustment	1,281	1,697	2,522
Amortization of deferred costs and accretion of fees on loans receivable, net	(410)	(501)	(41)
Write-offs of uncollectible receivables	2,622	40	494
Deferred income taxes	(995)	(81)	(3)
Stock-based compensation	222	194	162
Loans funded, held for sale to secondary market	(28,131)	(29,694)	(55,655)
Proceeds from sale of guaranteed loans	25,722	40,033	54,142
Principal collected on loans subject to secured borrowings	3,695	3,613	5,698
Other operating activity	(935)	(822)	(1,587)
Changes in operating assets and liabilities:
Accounts receivable	(419)	3,197	6,692
Other assets	1,233	1,019	(4,077)
Accounts payable and accrued expenses	(1,080)	(6,326)	(365)
Deferred leasing costs	(1,838)	(1,695)	(5,773)
Other liabilities	(274)	(6,825)	2,221
Due to related parties	4,675	(1,601)	2,218
Net cash provided by operating activities	12,827	40,985	61,456
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to investments in real estate	(14,731)	(24,600)	(12,055)
Acquisition of real estate	(6,131)	0	(112,048)
Proceeds from sale of real estate, net	0	941,032	0
Loans funded	(25,393)	(9,898)	(18,579)
Principal collected on loans	7,884	10,273	10,770
Other investing activity	51	386	178
Net cash (used in) provided by investing activities	(38,320)	917,193	(131,734)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment of unsecured revolving lines of credit, revolving credit facilities, mortgages payable, term notes and principal on SBA 7(a) loan-backed notes	(57,584)	(192,987)	(186,231)
Proceeds from unsecured revolving lines of credit, revolving credit facilities and term notes	77,516	158,500	180,000
Investments in marketable securities in connection with the legal defeasance of mortgages payable	0	(268,194)	0
Prepayment penalties and other payments for early extinguishment of debt	0	(5,660)	0
Payment of principal on secured borrowings	(3,695)	(3,613)	(5,698)
Proceeds from secured borrowings	0	0	772
Payment of deferred preferred stock offering costs	(943)	(1,320)	(1,136)
Payment of deferred costs	(983)	(423)	(4,469)
Payment of common dividends	(4,431)	(13,141)	(21,895)
Payment of special cash dividends	0	(613,294)	(1,575)
Net proceeds from issuance of Series A Preferred Warrants	28	385	73
Net proceeds from issuance of Preferred Stock	41,958	37,197	35,984
Repurchase of Preferred Stock	0	(75,155)	0
Payment of preferred stock dividends	(16,536)	(22,157)	(2,173)
Redemption of Preferred Stock	(2,084)	(228)	(113)
Noncontrolling interests’ distributions	(51)	(522)	(74)
Noncontrolling interests’ contributions	0	455	0
Net cash provided by (used in) financing activities	33,195	(1,000,157)	(6,535)
Change in cash balances included in assets held for sale	0	755	(755)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	7,702	(41,224)	(77,568)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	35,947	77,171	154,739
End of period	43,649	35,947	77,171
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Total cash and cash equivalents and restricted cash	35,947	77,171	77,171
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	10,315	13,674	27,473
Federal income taxes paid	273	1,000	622
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Accrued capital expenditures, tenant improvements and real estate developments	267	5,663	11,875
Net increase in fair value of derivatives applied to other comprehensive income	0	0	1,727
Accrued deferred costs	125	35	206
Accrued preferred stock offering costs	675	264	172
Accrual of dividends payable to preferred stockholders	11,343	9,873	14,935
Preferred stock offering costs offset against redeemable preferred stock	583	350	229
Reclassification of Series A Preferred Stock from temporary equity to permanent equity	35,483	35,649	27,887
Reclassification of loans receivable, net to real estate owned	174	243	0
Reclassification of Series A Preferred Stock from permanent equity to accounts payable and accrued expenses	25	20	0
Establishment of right-of-use asset and lease liability	0	362	0
Marketable securities transferred in connection with the legal defeasance of mortgages payable	0	268,194	0
Mortgage notes payable legally defeased	0	245,000	0
Mortgage note assumed in connection with our sale of real estate	0	28,200	0
Redeemable preferred stock deemed dividends	377	0	0
Accrued Redeemable Preferred Stock fees	493	0	0
Equity-based payment for management fees and base service fee	$ 7,400	$ 0	$ 0