THE FREMF TRUSTS - Condensed Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Variable Interest Entity [Line Items]
Net interest income	$ 4,831,984			$ 3,795,884			$ 13,791,320	$ 12,049,146
Unrealized gain on multi-family loans held in securitization trusts							0	694,339
Net income	$ 2,551,010	$ 1,878,703	$ 1,551,671	2,157,748	$ 1,394,170	$ 1,474,767	$ 5,981,384	5,026,685
FREMF Trusts
Variable Interest Entity [Line Items]
Interest income				0				78,361
Net interest income				0				78,361
Realized (loss) on multi-family loans held in securitization trusts				0				(709,439)
Unrealized gain on multi-family loans held in securitization trusts				0				694,339
Net income				$ 0				$ 63,261