Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.20.4
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents balance outside of FDIC limit $ 48,267    
Restricted cash 6,842 $ 6,000  
Accounts receivable, allowance for doubtful accounts 416 1,092  
Research and development 17,846 17,514 $ 11,773
Share-based compensation 8,470 10,304 $ 7,606
Accounts payable and accrued expenses $ 21,968 19,144  
Revision of Prior Period, Reclassification, Adjustment      
Accounts payable and accrued expenses   14  
Minimum      
Property and equipment, useful life (in years) 3 years    
Intangible asset, useful life (in years) 17 years    
Age of doubtful accounts 30 days    
Maximum      
Property and equipment, useful life (in years) 7 years    
Intangible asset, useful life (in years) 20 years    
Age of doubtful accounts 60 days    
Restricted Cash      
Collateral amount $ 6,000 $ 6,000  
Escrow deposit $ 842