Quarterly report pursuant to Section 13 or 15(d)

The Company and Basis of Presentation - Schedule of Revised Financial Statements (Details)

v3.21.2
The Company and Basis of Presentation - Schedule of Revised Financial Statements (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Reclassification [Line Items]              
Warrant liability $ 1,762 $ 3,263 $ 4,443   $ 1,762   $ 1,614
Accumulated deficit (167,514) (167,886) (160,110)   (167,514)   $ (145,803)
Gain (loss) on change in fair value of warrant liability 1,501 1,180 (2,829) $ 1,244 (148) $ 1,244  
Net income (loss) $ 372 $ (7,776) $ (14,307) $ (8,567) $ (21,711) $ (16,041)  
Net income (loss) per common share, basic (in dollars per share) $ 0.01 $ (0.11) $ (0.22) $ (0.19) $ (0.31) $ (0.38)  
Net loss per common share, diluted (in dollars per share) $ 0 $ (0.11) $ (0.22) $ (0.19) $ (0.31) $ (0.38)  
Previously reported              
Reclassification [Line Items]              
Warrant liability   $ 1,836 $ 2,499        
Accumulated deficit   (166,459) (158,166)        
Gain (loss) on change in fair value of warrant liability   663 (885)        
Net income (loss)   $ (8,293) $ (12,363)        
Net income (loss) per common share, basic (in dollars per share)   $ (0.12) $ (0.19)        
Net loss per common share, diluted (in dollars per share)   $ (0.12) $ (0.19)        
Adjustments              
Reclassification [Line Items]              
Warrant liability   $ 1,427 $ 1,944        
Accumulated deficit   (1,427) (1,944)        
Gain (loss) on change in fair value of warrant liability   517 (1,944)        
Net income (loss)   $ 517 $ (1,944)        
Net income (loss) per common share, basic (in dollars per share)   $ 0.01 $ (0.03)        
Net loss per common share, diluted (in dollars per share)   $ 0.01 $ (0.03)