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Income Taxes - Additional Information (Detail) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 27, 2020 | Mar. 26, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Income Taxes [Line Items] |  |  |  |
Valuation allowance |  |  | $ 5,326,000 | $ 5,319,000
Liability unrecognized tax benefits |  |  | 0 | 0
Percentage of business interest limitation | 50.00% | 30.00% |  |
Investment Tax Credit Carryforward [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred income taxes include the impact of state investment tax credits |  |  | 321,000 |
State investment tax credits with an unlimited carryforward period |  |  | $ 794,000 |
International Tax Jurisdictions [Member] | Earliest Tax Year [Member] | State Administration of Taxation, China [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2017 |
International Tax Jurisdictions [Member] | Earliest Tax Year [Member] | Ministry of Finance, India [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2018 |
International Tax Jurisdictions [Member] | Latest Tax Year [Member] | State Administration of Taxation, China [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2020 |
International Tax Jurisdictions [Member] | Latest Tax Year [Member] | Ministry of Finance, India [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2020 |
International Tax Jurisdictions [Member] | Other Assets [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred income tax asset |  |  | $ 0 | $ 48,000
Federal Tax Jurisdictions [Member] | Earliest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2017 |
Federal Tax Jurisdictions [Member] | Latest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2020 |
State Tax Jurisdictions [Member] | Earliest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2016 |
State Tax Jurisdictions [Member] | Latest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year |  |  | 2020 |
Maximum [Member] | Investment Tax Credit Carryforward [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Expiration date of state investment tax credits |  |  | Mar. 31, 2035 |
Minimum [Member] | Investment Tax Credit Carryforward [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Expiration date of state investment tax credits |  |  | Mar. 31, 2022 |

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- Definition The amount of deferred income tax assets pertaining to state investment tax credits that have an unlimited carryforward period. + References No definition available. + Details
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e31931-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e31917-109318 + Details
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