AVAILABLE-FOR-SALE SECURITIES (Details 1) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2015		Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Face Value	$ 533,221,763		$ 386,463,099
Unamortized premium	1,261,110		4,796,106
Unamortized discount
Designated credit reserve	(13,963,388)		(49,325,117)
Net, unamortized	(68,339,315)		(64,545,980)
Amortized Cost	452,180,170		361,107,387
Gross unrealized gain	9,938,872		8,402,890
Gross unrealized (loss)	(2,767,187)		(1,194,539)
Fair Value	462,558,886		368,315,738
Previous Accounting Guidance [Member]
Unamortized discount
Designated credit reserve			(12,697,796)	$ (16,126,355)
Net, unamortized			(17,454,022)	$ (22,400,380)
Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Face Value	222,488,315		309,790,551
Unamortized premium	1,195,567		4,796,106
Unamortized discount
Designated credit reserve	0		0
Net, unamortized	(1,667,139)		(2,244,687)
Amortized Cost	222,016,743		312,341,970
Gross unrealized gain	5,245,272		3,670,643
Gross unrealized (loss)	(197,444)		(1,181,928)
Fair Value	227,064,571		314,830,685
Non Agency RMBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Face Value	171,819,640	[1]	76,672,548
Unamortized premium	65,543	[1]	0
Unamortized discount
Designated credit reserve	(13,963,388)	[1]	(12,697,796)
Net, unamortized	(31,972,824)	[1]	(15,209,335)
Amortized Cost	125,948,971	[1]	48,765,417
Gross unrealized gain	2,498,770	[1]	4,732,247
Gross unrealized (loss)	(1,791,201)	[1]	(12,611)
Fair Value	129,863,571	[1]	53,485,053
Residential Multi Family [Member]
Schedule of Available-for-sale Securities [Line Items]
Face Value	138,913,808
Unamortized premium	0
Unamortized discount
Designated credit reserve	0
Net, unamortized	(34,699,352)
Amortized Cost	104,214,456
Gross unrealized gain	2,194,830
Gross unrealized (loss)	(778,542)
Fair Value	$ 105,630,744		$ 0

[1] Non-Agency AFS does not include interest-only securities with a notional amount of $214,5650,271, book value of $3,832,990, unrealized loss of $625,959 and a fair value of $3,207,031.