Schedule of Assumptions Used to Calculate Fair Value of Warrant Liability (Detail)	Sep. 30, 2021 yr USD ($)	Jun. 30, 2021 USD ($) yr
Risk Free Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.2	0.2
Expected life years
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input | yr	1.6	1.9
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	87.2	88.5
Dividend Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.0	0.0
Black-Scholes Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input | $	1.23	1.39