Leases (Supplemental balance sheet information related to leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating ROU assets	$ 1,604	$ 1,977
Finance ROU assets	3,083	6,797
Current liabilities:
Operating lease liability	2,160	3,380
Finance lease liability	$ 2,569	$ 3,738
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other current liabilities (Note 7)	Accrued expenses and other current liabilities (Note 7)
Non-current liabilities:
Operating lease liability	$ 682	$ 2,733
Finance lease liability	$ 191	$ 2,780
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities