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Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Prepaid Expenses and Other Current Assets    
Vendor deposits $ 3,191 $ 2,720
Prepaid insurance 752 1,975
Other prepaid expenses 2,038 2,324
Other current assets 90 48
Total prepaid expenses and other current assets $ 6,071 $ 7,067