Long-term debt - Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt, excluding unamortized debt issuance costs	$ 25,242	$ 25,786
Less: unamortized debt issuance costs	(98)	(179)
Total	25,144	25,607
Less: current portion of debt	(6,833)	(1,814)
Debt, long-term	$ 18,311	$ 23,793
Global Cooling Term Notes
Debt Instrument [Line Items]
Interest Rate	4.00%	4.00%
Total debt, excluding unamortized debt issuance costs	$ 2,596	$ 2,896
Term Loan
Debt Instrument [Line Items]
Interest Rate	7.00%	7.00%
Total debt, excluding unamortized debt issuance costs	$ 20,000	$ 20,000
Insurance premium financing
Debt Instrument [Line Items]
Interest Rate	8.30%	8.30%
Total debt, excluding unamortized debt issuance costs	$ 1,348	$ 1,074
Freezer equipment loan
Debt Instrument [Line Items]
Interest Rate	5.70%	5.70%
Total debt, excluding unamortized debt issuance costs	$ 317	$ 466
Manufacturing equipment loans
Debt Instrument [Line Items]
Interest Rate	5.70%	5.70%
Total debt, excluding unamortized debt issuance costs	$ 172	$ 266
Freezer installation loan
Debt Instrument [Line Items]
Interest Rate	6.30%	6.30%
Total debt, excluding unamortized debt issuance costs	$ 807	$ 1,078
Other loans
Debt Instrument [Line Items]
Total debt, excluding unamortized debt issuance costs	2	6
Total long-term debt
Debt Instrument [Line Items]
Debt, long-term	$ 18,311	$ 23,793