Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.1
Subsequent Events - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
Apr. 30, 2021
Apr. 29, 2021
Mar. 31, 2021
Dec. 31, 2020
Jun. 30, 2020
Aug. 16, 2019
Subsequent Event [Line Items]            
Common stock, shares authorized     95,000,000   95,000,000  
Additional paid-in capital     $ 100,828,000   $ 65,148,000  
Stock options exercisable     2,128,000      
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     2,379,000 1,168,000    
Subsequent Event [Member]            
Subsequent Event [Line Items]            
Common stock, shares authorized 95,000          
Additional paid-in capital $ 175,000          
Warrants issued 1,206          
Warrants exercise price $ 3.18          
Warrants issued 10          
Warrants exercise price expired $ 40          
Stock options exercisable 75          
Stock option exercise price $ 1.37          
Subsequent Event [Member] | Series C-1 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares 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 107,759          
Subsequent Event [Member] | Series C-2 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares 50          
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 41,188          
Subsequent Event [Member] | Series C-3 Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares 636          
Subsequent Event [Member] | Series C-3 Preferred Shares [Member] | Common stock            
Subsequent Event [Line Items]            
Conversion of Series C preferred stock to common stock, shares 553,047          
Subsequent Event [Member] | Series B Preferred Shares [Member]            
Subsequent Event [Line Items]            
Conversion of preferred stock to common stock, share   601        
Subsequent Event [Member] | Series B Preferred Shares [Member] | Common stock            
Subsequent Event [Line Items]            
Conversion of preferred stock to common stock, share   150        
Subsequent Event [Member] | Omnibus Equity Incentive Plan [Member]            
Subsequent Event [Line Items]            
Common stock, shares authorized 6,700          
Additional paid-in capital $ 13,000