v3.20.4

Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value (Detail) - Recurring [Member] - Level 3 [Member] - Derivative Liability [Member] - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 01, 2020 | Oct. 31, 2020 | Dec. 31, 2019
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |  |
Beginning Balance | $ 1,721 | $ 2,527 |
Initial recognition of conversion features and warrants, October 2019 |  |  | $ 7,954
Change in fair value of derivative liability | 806 | (543) | (6,233)
Extinguishment of derivative liability resulting from debt conversion |  | $ (1,984) |
Ending Balance | $ 2,527 |  | $ 1,721

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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=117815213&loc=d3e19207-110258 + Details
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