Leases - Summary of Components of Lease Costs (Detail) $ in Thousands	12 Months Ended
	Mar. 31, 2020 USD ($)
Lease cost
Operating lease cost	$ 254
Total lease cost	254
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	264
Financing cash flows from finance leases	1
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	650
Finance leases	$ 5