Leases - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Mar. 31, 2021
Lessee Lease Description [Line Items]
Operating lease, liabilities current	$ 220,000	$ 152,000
Finance lease, liabilities current	1,000	1,000
Operating lease, liabilities non-current	302,000	82,000
Finance lease, liabilities, non-current	2,000	3,000
Operating right-of-use assets	506,000	213,000
Finance lease right-of-use assets	$ 3,000	$ 3,000
Minimum
Lessee Lease Description [Line Items]
Non-cancellable lease terms	16 months
Maximum
Lessee Lease Description [Line Items]
Non-cancellable lease terms	3 years