Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
Other assets	$ 1,919	$ 2,001
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Capital lease obligation, current	$ 420	$ 422
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Capital lease obligation, current	Capital lease obligation, current
Other long-term liabilities	$ 1,658	$ 1,761
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long term liabilities	Other long term liabilities
Total operating lease liabilities	$ 2,078	$ 2,183
Finance Leases
Property, plant, and equipment	81	81
Accumulated depreciation	(32)	(25)
Property, plant, and equipment, net	49	56
Capital lease obligation, current	$ 14	$ 14
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Capital lease obligation, current	Capital lease obligation, current
Other long-term liabilities	$ 39	$ 43
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long term liabilities	Other long term liabilities
Total finance lease liabilities	$ 53	$ 57