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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity Incentive plan shares for issuance authorized 5,000,000    
Weighted Average Exercise Price, Exercised   $ 3.95  
Number of shares exercised on a net exercise basis   250,000  
Number of shares exercised and delivered   44,698  
Number of shares exercised for cash   24,750  
Number of stock options exercised 0 274,750  
Accrued expenses and other current liabilities $ 3,563   $ 3,366
STIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accrued expenses and other current liabilities $ 0   $ 0
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total intrinsic value   $ 100  
Fair value   $ 100  
Vested (in shares)   14,804