THE FREMF TRUSTS - Condensed Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Variable Interest Entity [Line Items]
Net interest income	$ 3,117,572	$ 5,783,761
General and administrative fees	(1,390,061)	(1,588,572)
Unrealized gain (loss) on multi-family loans held in securitization trusts	(1,355,774)	1,299,630
Net income	11,315,000	2,369,141
FREMF Trusts
Variable Interest Entity [Line Items]
Interest income	13,227,188	13,948,754
Interest expense	12,526,295	13,237,724
Net interest income	700,893	711,030
General and administrative fees	(623,254)	(648,934)
Unrealized gain (loss) on multi-family loans held in securitization trusts	(1,355,774)	1,299,630
Net income	$ (1,278,135)	$ 1,361,726