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Corporate Restructuring - Additional Information (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 16, 2018 Employee | Nov. 03, 2018 USD ($) | Nov. 03, 2018 USD ($)
Restructuring Cost And Reserve [Line Items] |  |  |
Corporate restructuring plan expected initiation, date | May 16, 2018 |  |
Number of positions eliminated | 56 |  |
Percentage of positions eliminated from work force | 15.00% |  |
Percentage of total work force eliminated as a part of corporate restructuring plan | 2.00% |  |
Number of employees notified of their termination | Employee | 36 |  |
Number of positions representing open that will not be filled | 20 |  |
Restructuring and cost remaining cash expenditures |  | $ 1.5 |
Accrued liability related to restructuring |  | 0.3 | $ 0.3
Severance, One-time Termination Benefits and Other Employee-related Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Corporate restructuring |  | $ 0.3 | $ 1.9

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