Long-term Debt - Schedule of long-term debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Unamortized discount	$ 187	$ 285
Total debt excluding Revolver	28,884	38,863
Line of credit for capital expenditures
Debt Instrument [Line Items]
Total debt excluding Revolver	$ 1,064	1,220
Line of credit | PPP under CARES Act | Secured debt
Debt Instrument [Line Items]
Effective interest rate	1.00%
Total debt excluding Revolver	$ 0	$ 5,999
Line of credit | New US Term Loan | Secured debt
Debt Instrument [Line Items]
Effective interest rate	5.50%	5.25%
Unamortized discount	$ 100
Total debt excluding Revolver	$ 20,383	$ 22,768
Line of credit | CA term loan | Secured debt
Debt Instrument [Line Items]
Effective interest rate	5.50%	5.25%
Total debt excluding Revolver	$ 7,437	$ 8,876
Line of credit | October 1, 2021 through November 7, 2023 | New US Term Loan | Secured debt
Debt Instrument [Line Items]
Principal payment amount	800
Line of credit | October 1, 2021 through November 7, 2023 | CA term loan | Secured debt
Debt Instrument [Line Items]
Principal payment amount	400
Unamortized discount	$ 100
Line of credit | October 1, 2021 through November 7, 2023 | Line of credit for capital expenditures
Debt Instrument [Line Items]
Effective interest rate	5.50%	5.25%
Percent of principal payment	12.50%