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Employee Benefit Plans - Long-Term Incentive Plans (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
May 23, 2018 | Jan. 01, 2022 | Mar. 31, 2016
Nonemployee director | Restricted stock units |  |  |
Long-Term Incentive Plans |  |  |
Value of awards granted |  | $ 130 |
Vesting percentage of awards granted |  | 100.00% |
Reduction of annual grant | 25.00% |  |
2016 long term incentive plan |  |  |
Long-Term Incentive Plans |  |  |
Number of common shares reserved for issuance (in shares) | 10,288,468 |  | 3,000,000
Number of additional shares of common stock (in shares) | 5,000,000 |  |
Term of award under the plan |  | 10 years |
Vesting period |  | 3 years |
2008 long term incentive plan |  |  |
Long-Term Incentive Plans |  |  |
Number of additional shares of common stock (in shares) | 2,288,468 |  |

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