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Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Payables And Accruals [Abstract]    
Accrued compensation $ 378 $ 829
Accrued legal and professional fees 31 240
Other accrued expenses 31 21
Accrued expenses $ 440 $ 1,090