Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.1
Subsequent Events - Additional Information (Detail) - USD ($)
1 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Mar. 25, 2021
Feb. 10, 2021
Jan. 01, 2021
Feb. 28, 2021
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2020
Feb. 24, 2021
Dec. 31, 2019
Oct. 31, 2019
Nov. 09, 2018
Subsequent Event [Line Items]                      
Proceeds from the exercise of common stock warrants             $ 46,000        
Shares issued             97,708,502   31,439,000    
Shares issued price per share                   $ 0.5750  
Equity raise of gross proceeds       $ 14,400,000 $ 24,000,000 $ 24,000,000          
SWK Loan | Maximum                      
Subsequent Event [Line Items]                      
Debt instrument covenants unencumbered liquid assets                     $ 1,500,000
Subsequent Event                      
Subsequent Event [Line Items]                      
Common stock issued from exercise of warrants 35,460,000                    
Proceeds from the exercise of common stock warrants     $ 15,000,000                
Shares issued   14,000,000                  
Shares issued price per share   $ 1.03                  
Equity raise of gross proceeds   $ 14,400,000                  
Subsequent Event | Credit Agreement, Seventh Amendment | SWK Loan | Maximum                      
Subsequent Event [Line Items]                      
Debt instrument covenants unencumbered liquid assets               $ 15,000,000      
Subsequent Event | July 2020 Warrants                      
Subsequent Event [Line Items]                      
Proceeds from the exercise of common stock warrants $ 11,200,000                    
Subsequent Event | June 2020 Warrants                      
Subsequent Event [Line Items]                      
Proceeds from the exercise of common stock warrants $ 3,800,000