Net Loss Per Common Share - Schedule of Basic and Diluted Net Loss Per Share (Detail) - USD ($)	3 Months Ended						9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Basic and diluted net loss per common share calculation:
Net loss	$ (6,120,711)	$ (6,850,534)	$ (8,825,815)	$ (6,957,530)	$ (6,126,080)	$ (3,191,986)	$ (21,797,060)	$ (16,275,596)
Weighted average common shares outstanding — basic and diluted:	130,172,441			112,071,354			127,611,426	111,961,971
Net loss per share of common stock — basic and diluted	$ (0.05)			$ (0.06)			$ (0.17)	$ (0.15)