Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Available-for-sale securities	$ 0	$ 10,748,966
Commercial mortgage loans held-for-investment	38,969,471	25,077,632
Multi-family loans held in securitization trusts	78,361	20,891,992
Residential loans held in securitization trusts	0	2,102,352
Cash and cash equivalents	9,647	134,002
Interest expense:
Repurchase agreements - available-for-sale securities	0	(7,637,242)
Collateralized loan obligations	(20,882,076)	(12,578,306)
Secured term loan	(2,761,561)	0
Multi-family securitized debt obligations	0	(19,652,710)
Residential securitized debt obligations	0	(1,685,971)
Net interest income	15,413,842	17,400,715
Other income:
Realized (loss) on investments, net	(709,439)	(33,391,712)
Realized gain on derivative contracts, net	0	25,984,870
Change in unrealized (loss) on derivative contracts, net	0	(5,349,613)
Change in unrealized gain (loss) on mortgage servicing rights	(1,297,579)	1,033,926
Change in unrealized gain (loss) on multi-family loans held in securitization trusts	694,339	(6,398,348)
Change in unrealized gain on residential loans held in securitization trusts	0	5,650,199
Servicing income, net	869,032	940,090
Other income	0	155,378
Total other (loss)	(443,647)	(11,375,210)
Expenses:
Management fee	2,245,065	2,335,998
General and administrative expenses	4,335,376	4,006,774
Operating expenses reimbursable to Manager	1,629,908	2,375,804
Other operating expenses	360,517	1,003,734
Compensation expense	193,962	252,912
Total expenses	8,764,828	9,975,222
Net income (loss) before provision for income taxes	6,205,367	(3,949,717)
Benefit from (provision for) income taxes	43,523	(1,521,745)
Net income	6,248,890	(5,471,462)
Dividends to preferred stockholders	(491,764)	(3,528,588)
Deemed dividend on preferred stock related to redemption	(3,093,028)	0
Net income (loss) attributable to common stockholders (basic and diluted)	2,664,098	(9,000,050)
Earnings (loss) per share:
Net income (loss) attributable to common stockholders	$ 2,664,098	$ (9,000,050)
Weighted average number of shares of common stock outstanding (in shares)	23,687,812	23,613,636
Basic and diluted income (loss) per share (in dollars per share)	$ 0.11	$ (0.38)
Dividends declared per share of common stock (in dollars per share)	$ 0.30	$ 0.28