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Stock Based Compensation - Omnibus Incentive Plan (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Sep. 25, 2017
Cash Performance        
Stock based compensation        
Vesting period 3 years      
Valuation Assumptions:        
Unrecognized compensation expense     $ 663  
Omnibus Plan        
Valuation Assumptions:        
Unrecognized compensation expense $ 126      
Period over which compensation expense expected to recognize 9 months 18 days      
Omnibus Plan | Stock Options        
Stock based compensation        
Number of shares authorized       1,200,000
Number of shares available for grant 278,199      
Stock options granted (in shares) 0 159,755    
Stock option life (in years) 10 years      
Number of shares        
Balance at beginning of year (in shares) 910,627      
Granted (in shares) 0 159,755    
Forfeited (in shares) (117,543)      
Balance at end of year (in shares) 793,084 910,627    
Options: Options vested and exercisable 542,513      
Options: Options vested and expected to vest 793,084      
Weighted-Average Exercise Price        
Balance at beginning of year (in dollars per share) $ 14.99      
Forfeited (in dollars per share) 15.48      
Balance at end of year (in dollars per share) 14.91 $ 14.99    
Weighted-Average Exercise Price: Options vested and exercisable 19.01      
Weighted-Average Exercise Price: Options vested and expected to vest $ 14.91      
Weighted- Average Remaining Contractual Term (in Years)        
Balance (in years) 7 years 4 months 24 days      
Weighted-Average Remaining Contractual Term (in Years): Options vested and exercisable 7 years 1 month 24 days      
Weighted-Average Remaining Contractual Term (in Years): Options vested and expected to vest 7 years 4 months 24 days      
Number of unvested options scheduled to vest        
Non-Vested Options as of beginning of period 605,352      
Granted (in shares) 0 159,755    
Forfeited (in shares) (78,676)      
Vested (in shares) (276,105)      
Non-Vested Options as of end of period 250,571 605,352    
Weighted-Average Grant Date Fair Value        
Non-Vested, beginning balance $ 3.14      
Granted: Weighted-Average Grant Date Fair Value   $ 1.21    
Forfeited: Weighted-Average Grant Date Fair Value 3.39      
Vested: Weighted-Average Grant Date Fair Value 4.20      
Non-Vested, ending balance $ 1.90 $ 3.14    
Valuation Assumptions:        
Expected term in years   6 years    
Volatility (as a percent)   48.00%    
Risk-free interest rate   2.70%    
Omnibus Plan | Stock Options | Maximum        
Valuation Assumptions:        
Volatility rate, peer group determined by tech companies that completed IPO within the state year range (in years) 10 years      
Awards vesting beginning the first anniversary of the grant date | Stock Options        
Stock based compensation        
Vesting period 3 years      
2020 | Omnibus Plan | Stock Options        
Number of unvested options scheduled to vest        
Non-Vested Options as of end of period 200,364      
2021 | Omnibus Plan | Stock Options        
Number of unvested options scheduled to vest        
Non-Vested Options as of end of period 50,207