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Equity - Equity Incentive Plan (Details) $ / shares in Units, shares in Thousands, $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 17, 2021 shares | Dec. 31, 2019 shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares
Share-based compensation |  |  |  |
Ownership Percentage Of Noncontrolling Interest Increase From Amount Granted As Compensation |  | 1 |  |
Fair Value of stock award | $ |  |  | $ 0 | $ 1
Grants of stock options |  |  | 1,065 | 743
Stock option forfeitures (in shares) |  |  | 471 | 60
Exercise of stock options (in shares) |  |  | 327 | 117
Share-based Compensation Outstanding - Reserved but unissued shares under the Plan |  | 2,131 | 2,964 | 2,697
Exercise price (in dollars per share) | $ / shares |  |  | $ 3.15 | $ 1.07
Equity Incentive Plan [Member] |  |  |  |
Share-based compensation |  |  |  |
Outstanding options and restricted stock units |  | 2,697 |  | 3,076
Reserved but unissued shares under the Plans |  |  | 2,901 | 1,217
Total authorized shares under the Plans |  |  | 5,977 | 3,914
2021 Plan |  |  |  |
Share-based compensation |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum | 10.00% |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Increase Shares Available for Issuance | 400 |  |  |
2011 Plan |  |  |  |
Share-based compensation |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Amount Carryover | $ |  |  | $ 3,381 |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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