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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021
Income Tax Contingency [Line Items] |  |
Valuation allowance | $ 78,071 | $ 47,076
Impact on effective tax rate | 102,500 |
Accrued interest or penalties associated with uncertain tax positions | 1,200 | $ 0
Accrued interest and penalties | 2,000 |
United States [Member] |  |
Income Tax Contingency [Line Items] |  |
Operating loss carryforwards | $ 854,700 |
Operating loss carryforwards expiration beginning year | 2023 |
Tax years subject to examination | 2019 and thereafter |
United States [Member] | Research & Development [Member] |  |
Income Tax Contingency [Line Items] |  |
Tax credit carryforward amount | $ 242,900 |
United States [Member] | Research & Development [Member] | Earliest Tax Year [Member] |  |
Income Tax Contingency [Line Items] |  |
Tax credit carryforwards expiration beginning year | 2026 |
State [Member] |  |
Income Tax Contingency [Line Items] |  |
Operating loss carryforwards | $ 546,500 |
Operating loss carryforwards expiration beginning year | 2023 |
Tax years subject to examination | 2019 and thereafter |
State [Member] | Research & Development [Member] |  |
Income Tax Contingency [Line Items] |  |
Tax credit carryforward amount | $ 192,800 |
State [Member] | Research & Development [Member] | Earliest Tax Year [Member] |  |
Income Tax Contingency [Line Items] |  |
Tax credit carryforwards expiration beginning year | 2023 |
Foreign [Member] |  |
Income Tax Contingency [Line Items] |  |
Tax years subject to examination | 2018 and thereafter |

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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)(b)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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