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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Tax Credit Carryforward [Line Items]        
Valuation allowance $ 4,731 $ 2,896    
Increase in valuation allowance 1,800 0    
Net operating loss carryforwards, state 97,100      
Net operating loss carryforwards, federal 124,100      
State net operating loss carryforwards subject to expiration 83,600      
State research and development tax credit carryforwards subject to expiration 200      
Unrecognized tax benefits 6,188 $ 3,162 $ 2,475 $ 2,900
Effective tax rate 4,200      
Domestic Tax Authority        
Tax Credit Carryforward [Line Items]        
Tax credit carryforwards, research 11,400      
State and Local Jurisdiction        
Tax Credit Carryforward [Line Items]        
Tax credit carryforwards, research $ 8,400