Restructuring Charge - Summary of Reconciliation of Changes in Restructuring Reserve (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Restructuring And Related Activities [Abstract] | ||||
| Balance at beginning of year | $ 18 | $ 120 | ||
| Expense for restructuring | $ 316 | 316 | $ 630 | |
| Amounts paid for restructuring | $ (18) | (418) | ||
| Balance at end of year | $ 18 | $ 120 | ||
| X | ||||||||||
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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