Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Summary of Accrued Expenses (Details)

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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accrued Compensation $ 2,458 $ 8,562  
Accrued sales taxes payable 937 372  
Accrued professional services 1,149 1,742  
Accrued materials 8,174 3,094  
Accrued Other 2,034 1,437  
Accrued warranty 380 452 $ 41
Accrued Liabilities, Current, Total $ 15,132 $ 15,659