Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Operating Leases
Other assets	$ 1,832	$ 2,001
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Capital lease obligation, current	$ 453	$ 422
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]
Other long-term liabilities	$ 1,512	$ 1,761
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long term liabilities	Other long term liabilities
Total operating lease liabilities	$ 1,965	$ 2,183
Finance Leases
Property, plant and equipment	82	81
Accumulated depreciation	(36)	(25)
Property, plant and equipment, net	46	56
Capital lease obligation, current	$ 14	$ 14
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]
Other long-term liabilities	$ 36	$ 43
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long term liabilities	Other long term liabilities
Total finance lease liabilities	$ 50	$ 57