Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.2
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Sep. 24, 2021
Aug. 19, 2021
Jul. 31, 2021
Jun. 30, 2021
Jun. 30, 2020
Aug. 16, 2019
Subsequent Event [Line Items]            
Common stock, shares issued       32,740,000 11,458,000  
Number of options granted       5,074 1,291  
Stock option exercise price       $ 0.61    
Common stock            
Subsequent Event [Line Items]            
Warrants exercise price           $ 0.001
Conversion of Series C preferred stock to common stock, shares       4,251,000    
Subsequent Event [Member]            
Subsequent Event [Line Items]            
Gross proceeds $ 15          
Common stock, shares issued 7,200,000          
Warrants To Purchase Common Stock 12,000,000          
Warrants exercise price $ 1.25   $ 1.00      
Investor warrants exercisable period, description three and one half years from the date of issuance          
Number of warrants exercised     69      
Warrants issued     353      
Warrants exercise price expired     $ 3.18      
Subsequent Event [Member] | Stock Option [Member]            
Subsequent Event [Line Items]            
Number of options granted     435      
Stock option exercise price     $ 1.24      
Stock option exercise period     Sep. 22, 2031      
Stock option commencing date, Description     The options vest in 12 equal monthly installments commencing October 22, 2021      
Subsequent Event [Member] | Preferred Stock Series C            
Subsequent Event [Line Items]            
Common stock, shares issued   1,698        
Dividend rate   10.00%        
Subsequent Event [Member] | Series C-1 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     1,125      
Subsequent Event [Member] | Series C-1 Preferred Shares [Member] | Common stock            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     970      
Subsequent Event [Member] | Series C-2 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     250      
Subsequent Event [Member] | Series C-2 Preferred Shares [Member] | Common stock            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     206      
Subsequent Event [Member] | Series C3 Preferred Shares            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     335      
Subsequent Event [Member] | Series C3 Preferred Shares | Common stock            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares     291      
Subsequent Event [Member] | Pre-Funded Warrants            
Subsequent Event [Line Items]            
Common stock, shares issued 4,800,000          
Warrants exercise price $ 0.001          
Subsequent Event [Member] | Warrant [Member]            
Subsequent Event [Line Items]            
Warrants exercise price $ 1.25          
Subsequent Event [Member] | Agent Warrant [Member]            
Subsequent Event [Line Items]            
Common stock, shares issued 600,000          
Warrants exercise price $ 1.5625          
Subsequent Event [Member] | Series C Agent Warrants [Member]            
Subsequent Event [Line Items]            
Common stock shares accrued   210        
Subsequent Event [Member] | Series C Agent Warrants [Member] | Preferred Stock Series C            
Subsequent Event [Line Items]            
Preferred stock, rate of dividend   10.00%        
Dividends payable   0.00%