RESTRUCTURING CHARGES - Summary of Restructuring Expense (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021  | 
Sep. 30, 2020  | 
Sep. 30, 2021  | 
Sep. 30, 2020  | 
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| Restructuring Reserve | ||||
| Beginning balance | $ 580 | $ 0 | ||
| Restructuring costs | $ 8 | $ 1,585 | 274 | 2,637 | 
| Adjustments to prior estimates | (50) | |||
| Cash payments | (784) | (2,397) | ||
| Ending balance | 20 | 240 | 20 | 240 | 
| Severance and Benefits | ||||
| Restructuring Reserve | ||||
| Beginning balance | 580 | 0 | ||
| Restructuring costs | 274 | 2,637 | ||
| Adjustments to prior estimates | (50) | |||
| Cash payments | (784) | (2,397) | ||
| Ending balance | 20 | 240 | 20 | 240 | 
| Facilities | ||||
| Restructuring Reserve | ||||
| Beginning balance | 0 | 0 | ||
| Restructuring costs | 0 | 0 | ||
| Adjustments to prior estimates | 0 | |||
| Cash payments | 0 | 0 | ||
| Ending balance | $ 0 | $ 0 | $ 0 | $ 0 | 
| X | ||||||||||
- Definition Restructuring Adjustments No definition available. 
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- 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 | ||||||||||
- 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://www.xbrl.org/2009/role/commonPracticeRef 
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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://www.xbrl.org/2003/role/disclosureRef 
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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- Details 
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- Details 
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