Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 450,479	$ 3,313,786	$ 3,226,430
Other comprehensive income (loss):
Increase (decrease) in net unrealized gain (loss) on available-for-sale securities	(14,776,266)	10,845,303	(12,094,479)
Reclassification adjustment for net gain (loss) included in net income	1,969,108	7,458,001	(1,434,472)
Reclassification adjustment for other-than-temporary impairments included in net income	745,492	0	0
Reclassification cumulative adjustment for Linked Transactions	4,457,544	0	0
Total other comprehensive income (loss)	(7,604,122)	18,303,304	(13,528,951)
Less: Dividends to preferred stockholders	(3,522,036)	(2,887,296)	(44,827)
Comprehensive income (loss) attributable to common stockholders	$ (10,675,679)	$ 18,729,794	$ (10,347,348)