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Schedule of Assumptions Used to Calculate Fair Value of Warrant Liability (Detail) - ClinicalTrials
Mar. 31, 2021
Jun. 30, 2020
Risk Free Interest Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 0.1 0.2
Expected life years    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 2.1 2.9
Expected volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants and Rights Outstanding, Measurement Input 82.4 77.4
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 1.83 2.52