PREFERRED STOCK AND TEMPORARY EQUITY - Summary of Temporary Equity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period	$ 22,179,963
Plus: discount accretion	2,169,597	$ 1,960,013
Balance at end of period	28,146,347	22,179,963
Series B Preferred Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period	8,900,208	7,190,467
Less: conversions of shares to common	0	(62,962)
Plus: discount accretion	1,420,391	1,118,259
Plus: dividends in kind	685,807	654,444
Balance at end of period	11,006,406	8,900,208
Series B1 Preferred Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period	13,279,755	15,769,478
Less: conversions of shares to common	(2,241,890)	(5,068,602)
Plus: discount accretion	749,206	841,754
Plus: dividends in kind	955,976	1,737,125
Balance at end of period	$ 12,743,047	$ 13,279,755