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Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Warrant liability | $ (14,309) | $ (22,355) |  |
Level 3 | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Warrant liability | (14,309) | (22,355) | $ (20,176) | $ (40,483)
Total liability | $ (14,309) | $ (22,355) |  |

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