Warrants - Summary of the Significant Assumptions Used in Determining the Fair Value of the Additional Modification Warrants (Detail)	Sep. 30, 2020 yr	May 21, 2020 yr
Equity Volatility
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0
Equity Volatility | Additional Modifications Warrants [member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		100
Remaining Term
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0
Remaining Term | Additional Modifications Warrants [member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		5
Risk free rate
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0
Risk free rate | Additional Modifications Warrants [member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		0.42