v3.20.2
Stockholders’ Equity and Stock-Based Compensation - Warrant Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Shares of Stock under Warrants    
Beginning balance (in shares) 24,406  
Granted (in shares) 95,396  
Exercised (in shares) (90,093)  
Canceled (in shares) 0  
Ending balance (in shares) 29,709 24,406
Vested and exercisable (in shares) 29,709  
Weighted- Average Exercise Price    
Beginning balance (in USD per share) $ 1.76  
Granted (in USD per share) 0.22  
Exercised (in USD per share) 0.21  
Ending balance (in USD per share) 1.54 $ 1.76
Vested and exercisable (in USD per share) $ 1.54  
Weighted- Average Remaining Contractual Term    
Balance 4 years 1 month 9 days 4 years 9 months 25 days
Granted 4 years 6 months 10 days  
Vested and exercisable 4 years 1 month 9 days  
Aggregate Intrinsic Value    
Beginning balance $ 7,933  
Exercised 37,150  
Ending balance 1,813 $ 7,933
Vested and exercisable $ 0