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Revenue - Schedule of Deferred Charges Activity (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Deferred charges beginning balance | $ 1,433 |  | $ 1,438 |
Additions, net of adjustments, during the period | 794 |  | 1,241 |
Recognized as cost of sales | (921) |  | (1,246) |
Deferred charges ending balance | 1,306 |  | 1,433 |
December 31, 2021 [Member] |  |  |  |
Recognized as cost of sales | 764 |  | 741 |
December 31, 2022 [Member] |  |  |  |
Recognized as cost of sales | 420 | [1] | 531 | [2]
December 31, 2023 and Thereafter [Member] |  |  |  |
Recognized as cost of sales | $ 122 | [1] | $ 161 | [2]
[1] | Amounts included in Other Assets in the Company's Consolidated Balance Sheets at December 31, 2020.
[2] | Amounts included in Other Assets in the Company's Consolidated Balance Sheets at December 31, 2019.

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