AVAILABLE-FOR-SALE SECURITIES - OTTI Charges (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Cumulative credit (loss) at beginning of period	$ (3,074,728)	$ (3,074,728)
Additions:
Initial (increase) in credit reserves	0	0
Subsequent (increase) in credit reserves	0	0
Initial additional other-than-temporary credit impairment losses	0	0
Subsequent additional other-than-temporary credit impairment losses	0	0
Reductions:
For securities sold decrease in credit reserves	0	0
For securities sold decrease in other-than-temporary impairment	0	0
Cumulative credit (loss) at end of period	$ (3,074,728)	$ (3,074,728)