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Stockholders' Equity - LTIP (Details) - Employee Stock Option - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2017 | Mar. 31, 2017
2018 Long-Term Incentive Plan NQSOs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock granted net of forfeitures |  | $ 4,544 |
Compensation expenses recorded | $ 410 | 489 |
Long Term Incentive Plan NQSOs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting period (in years) |  |  | 3 years
Unrecognized stock compensation expense | $ 7,989 | $ 7,989 |

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