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Long Term Retention Plan (Long Term Retention Program Accrued Compensation Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | $ 5 | $ 28 | $ 35 | $ 51
LTRP 2016 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP |  | 2 |  | 1
LTRP 2017 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | (3) | 3 | (4) | 2
LTRP 2018 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | (3) | 1 | (3) | 2
LTRP 2019 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 1 | 7 | 7 | 15
LTRP 2020 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 2 | 8 | 9 | 18
LTRP 2021 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 3 | $ 7 | 11 | $ 13
LTRP 2022 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | $ 5 |  | $ 15 |

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