Leases - Balance Sheet Classification of Operating Lease Right-of-use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other
Operating lease right-of-use assets	$ 511	$ 572
Liabilities
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Operating lease liabilities	$ 517	$ 547