Long-term debt - Interest Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Long-term debt
Interest expense	$ 348	$ 238
Amortization of debt issuance costs, including end of term fee accretion	56	76
Interest expense	404	$ 314
Accrued interest	122		$ 117
Accrued expenses and other liabilities
Long-term debt
Accrued interest	$ 122		$ 117