PREFERRED STOCK AND DETACHABLE WARRANTS - Changes in Derivative Liability (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Balance at beginning of period	$ 330,412	$ 1,969,216
Value of warrants exercised	(1,105,935)	0
Change in valuation of warrants	1,780,203	(1,698,747)
Balance at end of period	$ 1,004,680	$ 270,469