PREFERRED STOCK AND DETACHABLE WARRANTS - Activity in Preferred Stock (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Increase (Decrease) in Temporary Equity
Balance at beginning of period			$ 55,366,186				$ 55,366,186
Plus: discount accretion		$ 283,555	223,727	$ 29,157	$ 539,235	$ 932,003
Balance at end of period	$ 39,771,408						39,771,408
Series B Preferred Stock
Increase (Decrease) in Temporary Equity
Balance at beginning of period			12,718,339			11,006,406	12,718,339	$ 11,006,406
Less: conversions of shares to common							(8,446,837)	0
Less: exchanges of shares to common							(4,747,250)	0
Plus: discount accretion							0	854,364
Plus: dividends in kind	0			188,837			475,748	547,349
Balance at end of period	0			12,408,119			0	12,408,119
Series B1 Preferred Stock
Increase (Decrease) in Temporary Equity
Balance at beginning of period			$ 11,036,173			$ 12,743,047	11,036,173	12,743,047
Less: conversions of shares to common							(12,046,441)	(3,368,474)
Plus: discount accretion							507,282	646,031
Plus: dividends in kind	0			171,380			502,986	546,557
Balance at end of period	$ 0			$ 10,567,161			$ 0	$ 10,567,161