Equity Incentive Plan - Schedule of Non-vested Options (Detail) - $ / shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested options at beginning	3,591,507
Granted	5,568,000
Vested	(2,920,332)
Cancelled/Forfeited	(1,884,004)
Non-vested options at ending	4,355,171	3,591,507
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested options at beginning	$ 1.36
Granted	0.89	$ 0.96
Vested	1.27
Cancelled/Forfeited	1.13
Non-vested options at ending	$ 0.91	$ 1.36