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Equity - Inducement Stock Options (Details) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 1,065 | 743 |
Non-Qualified Stock Option | Chief Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) |  |  | 341
Inducement Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation expense |  | $ 52 |
Inducement Stock Options | Non-Qualified Stock Option | Chief Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Fair value of the non-qualified stock options |  |  | $ 176
Compensation expense | $ 13 | $ 52 |
Intrinsic value | $ 31 |  |

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