Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Expenses and Other Current Liabilities
Accrued professional services	$ 2,320	$ 1,645
Accrued interest	2,488	841
Accrued payroll and benefits	1,675	1,014
Other accrued expense	571	368
Warranty liability	1,191	994
Customer deposits	228	85
Deferred revenue	111	62
Current portion of finance lease obligation	61	36
Total accrued expenses and other current liabilities	$ 8,645	$ 5,045