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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024
Income Taxes [Line Items] |  |
Valuation allowance | $ 1,048,000 | $ 5,241,000
Liability unrecognized tax benefits | 0 | $ 0
Investment Tax Credit Carryforward [Member] |  |
Income Taxes [Line Items] |  |
Deferred income taxes include the impact of state investment tax credits | 254,000 |
State investment tax credits with an unlimited carryforward period | $ 794,000 |
International Tax Jurisdictions [Member] | State Administration of Taxation, China [Member] |  |
Income Taxes [Line Items] |  |
Open tax year | 2021 2022 2023 2024 |
International Tax Jurisdictions [Member] | Ministry of Finance, India [Member] |  |
Income Taxes [Line Items] |  |
Open tax year | 2022 2023 2024 |
Federal Tax Jurisdictions [Member] |  |
Income Taxes [Line Items] |  |
Open tax year | 2021 2022 2023 2024 |
State Tax Jurisdictions [Member] |  |
Income Taxes [Line Items] |  |
Open tax year | 2020 2021 2022 2023 2024 |
Maximum [Member] | Investment Tax Credit Carryforward [Member] |  |
Income Taxes [Line Items] |  |
Expiration date of state investment tax credits | Mar. 31, 2039 |
Minimum [Member] | Investment Tax Credit Carryforward [Member] |  |
Income Taxes [Line Items] |  |
Expiration date of state investment tax credits | Mar. 31, 2030 |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15 + Details
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