COVID-19 Costs (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Unusual or Infrequent Items, or Both [Abstract] | ||||
Operating expenses | $ 881 | $ 1,012 | $ 2,743 | $ 1,433 |
Transportation costs | 109 | 96 | 283 | 96 |
Total COVID-19 costs | $ 990 | $ 1,108 | $ 3,026 | $ 1,529 |