CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Stock	Additional Paid- in Capital	Accumulated Deficit	Total
Beginning Balance at Dec. 31, 2018	$ 45,440	$ 365,400,748	$ (306,105,450)	$ 59,340,738
Beginning Balance, Shares at Dec. 31, 2018	45,440,704
Stock options exercised for cash	$ 12	57,732	0	57,744
Stock options exercised for cash, Shares	11,980
Warrants exercised for cash	$ 190	758,543	0	758,733
Warrants exercised for cash, shares	190,258
Stock warrants cashless exercised	$ 4	(4)	0	0
Stock warrants cashless exercised, Shares	4,032
Stock-based compensation	$ 77	4,073,428	0	4,073,505
Stock-based compensation (in shares)	76,440
Net loss	$ 0	0	(16,348,802)	(16,348,802)
Ending Balance at Sep. 30, 2019	$ 45,723	370,290,447	(322,454,252)	47,881,918
Ending Balance, Shares at Sep. 30, 2019	45,723,414
Beginning Balance at Jun. 30, 2019	$ 45,513	368,353,041	(316,994,766)	51,403,788
Beginning Balance, Shares at Jun. 30, 2019	45,513,523
Warrants exercised for cash	$ 188	753,166	0	753,354
Warrants exercised for cash, shares	188,459
Stock warrants cashless exercised	$ 4	(4)	0	0
Stock warrants cashless exercised, Shares	4,032
Stock-based compensation	$ 18	1,184,244	0	1,184,262
Stock-based compensation (in shares)	17,400
Net loss	$ 0	0	(5,459,486)	(5,459,486)
Ending Balance at Sep. 30, 2019	$ 45,723	370,290,447	(322,454,252)	47,881,918
Ending Balance, Shares at Sep. 30, 2019	45,723,414
Beginning Balance at Dec. 31, 2019	$ 45,728	371,573,909	(327,533,414)	44,086,223
Beginning Balance, Shares at Dec. 31, 2019	45,728,831
Issuance common stock for cash	$ 1,408	2,184,601	0	2,186,009
Issuance common stock for cash (in shares)	1,407,470
Warrants exercised for cash	$ 459	549,541	0	550,000
Warrants exercised for cash, shares	458,334
Issuance of common stock as commitment fee for future financing	$ 345	(345)	0	0
Issuance of common stock as commitment fee for future financing (Shares)	345,357
Stock-based compensation	$ 85	3,974,451	0	3,974,536
Stock-based compensation (in shares)	85,110
Net loss	$ 0	0	(20,198,843)	(20,198,843)
Ending Balance at Sep. 30, 2020	$ 48,025	378,282,157	(347,732,257)	30,597,925
Ending Balance, Shares at Sep. 30, 2020	48,025,102
Beginning Balance at Jun. 30, 2020	$ 46,617	374,828,385	(340,360,757)	34,514,245
Beginning Balance, Shares at Jun. 30, 2020	46,617,632
Issuance common stock for cash	$ 1,408	2,184,601		2,186,009
Issuance common stock for cash (in shares)	1,407,470
Stock-based compensation	$ 0	1,269,171	0	1,269,171
Stock-based compensation (in shares)	0
Net loss	$ 0	0	(7,371,500)	(7,371,500)
Ending Balance at Sep. 30, 2020	$ 48,025	$ 378,282,157	$ (347,732,257)	$ 30,597,925
Ending Balance, Shares at Sep. 30, 2020	48,025,102