Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.20.2
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Mar. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock-based compensation     $ 3,044 $ 22,154    
Weighted Average Remaining Life (in years)     1 year 3 months 18 days      
Stock Options [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of shares granted under the plan     293,220      
Weighted average exercise price of stock options     $ 1.23      
Number of shares exercisable under the plan 1,803,297   1,803,297      
Stock-based compensation $ 100 $ 400 $ 300 $ 1,400    
Unrecognized compensation expense for stock options issued 2,600   $ 2,600      
Weighted Average Remaining Life (in years)     7 years 8 months 23 days   8 years 1 month 2 days  
Restricted Stock Units (RSUs) [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Unrecognized compensation expense for stock options issued $ 800   $ 800      
Weighted-average recognized period     2 years      
2020 Inducement Equity Incentive Plan (the "2020 plan") [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Common stocvk reserve for issuance           800,000
Number of shares granted under the plan     450,000      
Weighted average exercise price of stock options     $ 1.02      
Number of shares exercisable under the plan 56,250   56,250      
2020 Inducement Equity Incentive Plan (the "2020 plan") [Member] | Restricted Stock Awards (RSAs) [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock awards granted     125,000      
Restricted stock awards with grant date fair value     $ 100