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Fair Value Measurements - Change in the Fair Value of the Derivative Warrant Liabilities (Detail) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Balance at beginning of period | $ 217,993 | $ 191,473 | $ 191,473 | $ 103,628
Changes in fair value of debt and liability instruments, included in net loss | 4,585 | 17,125 | 29,845 | (13,722)
Termination of DSP Options | (61,472) |  |  |
Liability instruments disposed due to deconsolidation of subsidiary |  | (3,325) | (3,325) | 101,567
Balance at end of period | $ 161,106 | $ 205,273 | $ 217,993 | $ 191,473

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, disposed due to deconsolidation of subsidiary. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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