Accounting Policies and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands |
Mar. 31, 2021 |
Dec. 31, 2020 |
---|---|---|
Accounting Policies [Abstract] | ||
Debt instrument, fair value disclosure | $ 44,364 | $ 44,548 |
Long-term debt, including current maturities | $ 39,876 | $ 39,871 |