Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock	Additional paid-in capital	Accumulated deficit	Total
Beginning balance at Dec. 31, 2018	$ 3,009	$ 108,485,219	$ (107,550,307)	$ 937,921
Balance (in shares) at Dec. 31, 2018	30,087,213
Stock-based compensation		1,256,310		1,256,310
Issuance of common stock upon exercise of options	$ 5	410,157		410,162
Issuance of common stock upon exercise of options (in shares)	52,819
Issuance of warrants upon debt financing		426,000		426,000
Issuance of common stock upon financing	$ 316	24,983,366		24,983,682
Issuance of common stock upon financing (in shares)	3,164,015
Net loss			(10,640,376)	(10,640,376)
Ending balance at Mar. 31, 2019	$ 3,330	135,561,052	(118,190,683)	17,373,699
Balance (in shares) at Mar. 31, 2019	33,304,047
Beginning balance at Dec. 31, 2019	$ 3,693	354,614,189	(175,895,493)	$ 178,722,389
Balance (in shares) at Dec. 31, 2019	36,933,217			36,933,217
Stock-based compensation		2,133,530		$ 2,133,530
Issuance of common stock upon exercise of options	$ 6	629,750		$ 629,756
Issuance of common stock upon exercise of options (in shares)	60,186			60,186
Issuance of common stock upon financing	$ 8	7,155,329		$ 7,155,337
Issuance of common stock upon financing (in shares)	82,019
Net loss			(32,484,146)	(32,484,146)
Ending balance at Mar. 31, 2020	$ 3,707	$ 364,532,798	$ (208,379,639)	$ 156,156,866
Balance (in shares) at Mar. 31, 2020	37,075,422			37,075,422