Going Concern and Management's Plan - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	Feb. 28, 2019	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Going Concern And Managements Liquidity Plan [Abstract]
Net loss		$ 2,598,060	$ 2,345,402
Accumulated deficit		48,011,033		$ 45,412,973	$ 45,289,526
Cash used in operating activities		$ 3,119,882	$ 2,265,360
Proceeds from FPO, net of offering costs	$ 5,600,000