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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Oct. 04, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Interest expense $ 184 $ 220 $ 366 $ 424  
Changes in fair value of promissory note $ 0 (1,629) $ 0 (605)  
Yaskawa Note          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Interest expense   36   74  
Changes in fair value of promissory note   $ 1,600   $ (605)  
Yaskawa Note | Yaskawa          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Principal and unpaid interest of convertible note         $ 15,600
Principal amount of long term loan facility         15,000
Accrued interest on promissory note         $ 600
Number of common stock shares converted per preferred share (in shares)         3,120,000