Operating Leases - Balance Sheet Presentation (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Right-of-Use Assets:
Right-of-use assets	$ 387	$ 487
Right-of-use assets, balance sheet line item	Other assets	Other assets
Operating Lease Liabilities:
Operating lease liabilities, current	$ 160	$ 180
Operating lease liabilities, noncurrent	223	305
Operating lease liabilities	$ 383	$ 485
Operating lease liabilities, current, balance sheet line item	Accrued liabilities
Operating lease liabilities, noncurrent, balance sheet line item	Other long-term liabilities