THE FREMF TRUSTS - Condensed Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Variable Interest Entity [Line Items]
Net interest income	$ 3,795,884			$ 5,114,636			$ 12,049,146	$ 12,802,118
General and administrative fees	(904,413)			(796,600)			(3,266,757)	(3,148,945)
Unrealized gain (loss) on multi-family loans held in securitization trusts							694,339	(5,861,373)
Net income (loss)	2,157,748	$ 1,394,170	$ 1,474,767	4,353,026	$ (21,490,063)	$ 11,315,000	5,026,685	(5,822,037)
FREMF Trusts
Variable Interest Entity [Line Items]
Interest income	0			336,824			78,361	20,540,942
Interest expense	0			237,980			0	19,404,532
Net interest income	0			98,844			78,361	1,136,410
General and administrative fees	0			(56,186)			0	(934,496)
Unrealized gain (loss) on multi-family loans held in securitization trusts	0			957,549			694,339	(5,861,373)
Net income (loss)	$ 0			$ 1,000,207			$ 772,700	$ (5,659,459)