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4. BALANCE SHEET DETAIL - Additional information (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2022 | Aug. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Cost reduction | 15.00% | 16.00% |  |  |
Severance related charges |  |  | $ 357,000 | $ 0 | $ 300,000
Accrued severance |  |  | 0 | $ 0 |
Cost of revenues |  |  |  |  |
Severance related charges |  |  | 204,000 |  | 100,000
Research and development |  |  |  |  |
Severance related charges |  |  | 128,000 |  |
Selling, general and administrative expense |  |  |  |  |
Severance related charges |  |  | $ 24,000 |  | $ 200,000

X
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- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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