Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Valuation Assumptions Using a Black-Scholes Pricing Model (Detail)

v3.20.2
Stockholders' Equity - Schedule of Valuation Assumptions Using a Black-Scholes Pricing Model (Detail) - Stock options [Member]
3 Months Ended
Sep. 30, 2020
Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Volatility 121.00%
Risk-free rate 0.19%
Term - years 4 months 24 days
Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Volatility 153.00%
Risk-free rate 0.42%
Term - years 5 years 9 months 18 days