QUARTERLY FINANCIAL DATA (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 22,720,000	$ 22,627,000	$ 21,595,000	$ 22,191,000	$ 22,162,000	$ 22,733,000	$ 23,610,000	$ 24,617,000	$ 28,046,192	$ 16,724,278	$ 11,087,306
Total interest expense	(17,938,000)	(17,881,000)	(16,767,000)	(16,408,000)	(16,259,000)	(16,580,000)	(17,837,000)	(18,857,000)
Net interest income	4,782,000	4,746,000	4,828,000	5,784,000	5,903,000	6,153,000	5,772,000	5,760,000	20,139,551	23,588,344	31,309,716
Other-than-temporary impairment	0	0	0	0	0	(558,000)	(146,000)	(21,000)
Other income (loss)	7,164,000	(5,949,000)	(3,989,000)	201,000	8,932,000	(908,000)	(5,838,000)	(18,275,000)
Total expenses	3,055,000	3,053,000	3,135,000	3,615,000	3,298,000	3,191,000	3,864,000	4,412,000
Net income (loss)	8,891,000	(4,256,000)	(2,297,000)	2,369,000	11,538,000	1,496,000	(4,076,000)	(16,948,000)	4,706,961	(7,989,955)	450,479
Net income (loss) attributable to common shareholders (basic and diluted)	8,000,000	(5,137,000)	(3,167,000)	1,489,000	10,647,000	616,000	(4,947,000)	(17,828,000)	1,184,925	(11,511,991)	(3,071,557)
Earnings (loss) per share:
Net income (loss) attributable to common shareholders (basic and diluted)	$ 8,000,000	$ (5,137,000)	$ (3,167,000)	$ 1,489,000	$ 10,647,000	$ 616,000	$ (4,947,000)	$ (17,828,000)	$ 1,184,925	$ (11,511,991)	$ (3,071,557)
Weighted average number of shares of common stock outstanding:	22,142,926	22,139,258	18,297,500	17,539,258	14,762,006	14,600,193	14,597,894	14,605,515	20,048,128	14,641,701	14,721,074
Basic and diluted income (loss) per share (in dollars per share)	$ 0.36	$ (0.23)	$ (0.17)	$ 0.08	$ 0.72	$ 0.04	$ (0.34)	$ (1.22)	$ 0.06	$ (0.79)	$ (0.21)