EARNINGS PER SHARE - Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net loss available to common shareholders	$ (3,911,581)	$ (4,635,372)	$ (11,215,851)	$ (6,652,027)
Denominator:
Weighted-average shares outstanding (in shares)	41,376,335	35,144,113	40,626,700	33,843,721
Basic loss per share (in dollars per share)	$ (0.09)	$ (0.13)	$ (0.28)	$ (0.20)
Numerator:
Net loss available to common shareholders	$ (3,911,581)	$ (4,635,372)	$ (11,215,851)	$ (6,652,027)
Denominator:
Weighted-average shares outstanding (in shares)	41,376,335	35,144,113	40,626,700	33,843,721
Effect of dilutive securities
Stock options and warrants (in shares)	0	0	0	0
Diluted weighted-average shares outstanding (in shares)	41,376,335	35,144,113	40,626,700	33,843,721
Diluted loss per share (in dollars per share)	$ (0.09)	$ (0.13)	$ (0.28)	$ (0.20)
Preferred stock
Effect of dilutive securities
Preferred stock (in shares)	0	0	0	0