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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating Loss Carryforwards [Line Items]    
Unrecognized tax benefits $ 0  
Uncertain tax position netted against deferred tax asset 1,600,000 $ 1,500,000
Increase (decrease) in valuation allowance 1,875,000 $ 1,941,000
Federal net operating loss carryforwards 210,500,000  
State net operating loss carryforwards $ 40,900,000  
Federal net operating loss carryforwards (“NOLs”) expiring year 2028  
State net operating loss carryforwards (“NOLs”) expiring year 2028  
Federal research tax credit carryforwards expiration period 2028  
Accrued expense regarding interest or penalties $ 0  
Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carry forwards 66,800,000  
Research tax credit carryforwards $ 4,700,000  
Federal [Member] | Maximum [Member]    
Operating Loss Carryforwards [Line Items]    
Percentage of future taxable income to be offset 80.00%  
State [Member]    
Operating Loss Carryforwards [Line Items]    
Research tax credit carryforwards $ 4,300,000