Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash and cash equivalents balance outside of FDIC limit   $ 35,224    
Right-of-use assets recorded   3,786    
Lease liabilities recorded   3,823    
Derecognition of capital lease assets $ 96      
Derecognition of capital lease liabilities 63      
Derecognition of deferred rent $ 70      
Restricted cash   6,000 $ 6,000  
Accounts receivable, allowance for doubtful accounts   $ 1,092 $ 1,117  
Anti-dilutive securities excluded from computation of net loss per share   1,556,818 2,621,440 2,253,399
Research and development   $ 17,514 $ 11,773 $ 6,699
Share-based compensation   $ 10,304 $ 7,606 $ 3,609
Minimum        
Age of doubtful accounts   30 days    
Maximum        
Age of doubtful accounts   60 days