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Credit Facility (Details) - Line of credit
1 Months Ended
Nov. 30, 2016
USD ($)
Mar. 31, 2017
USD ($)
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Debt instrument term (in years) 3 years  
Maximum borrowing capacity $ 25,000,000.0  
Debt covenant, net cash equals or exceeds, amount 50,000,000  
Debt covenant, net cash falls below, amount $ 50,000,000  
Minimum adjusted quick ratio under debt compliance 1.50  
Amount outstanding   $ 0
Letter of Credit    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 25,000,000.0  
Prime Rate | Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Variable rate basis spread 0.50%  
LIBOR | Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Variable rate basis spread 2.50%