Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.22.0.1
Subsequent Events - Additional Information (Detail) - $ / shares
 1 Months Ended 3 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Subsequent Event [Line Items]        
Stock options exercisable 3,630,000 3,630,000    
Stock options, exercisable expired or forfeited, price $ 1.57      
Stock options exercised, Shares 243,000      
Stock options $ 10      
Stock options exercise price $ 19.89 $ 19.89    
Warrant [Member]        
Subsequent Event [Line Items]        
Stock options exercisable 756,000 756,000    
Stock options, exercisable expired or forfeited, price $ 3.18      
Common stock        
Subsequent Event [Line Items]        
Conversion of Series C preferred stock to common stock, shares   1,039,000 1,467,000 1,168,000
Stock options exercised, Shares       35,000
Series C-1 Preferred Shares [Member]        
Subsequent Event [Line Items]        
Conversion of Series C preferred stock to common stock, shares 50      
Series C-1 Preferred Shares [Member] | Common stock        
Subsequent Event [Line Items]        
Conversion of Series C preferred stock to common stock, shares 43