Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock	Additional paid-in capital	Accumulated deficit	Total
Beginning balance at Dec. 31, 2017	$ 2,549	$ 93,299,517	$ (76,584,843)	$ 16,717,223
Balance (in shares) at Dec. 31, 2017	25,492,992
Stock-based compensation		534,570		$ 534,570
Issuance of common stock upon exercise of options (in shares)				0
Issuance of common stock upon financing	$ 6	139,914		$ 139,920
Issuance of common stock upon financing (in shares)	56,900
Net loss			(4,805,559)	(4,805,559)
Ending balance at Mar. 31, 2018	$ 2,555	93,974,001	(81,390,402)	12,586,154
Balance (in shares) at Mar. 31, 2018	25,549,892
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			33,087,213
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			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			33,304,047