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Acquisition (Details) - WriteLab, Inc. - USD ($)
$ in Thousands
3 Months Ended
May 15, 2018
Jun. 30, 2018
Business Acquisition [Line Items]    
Initial cash consideration $ 12,450  
Escrow 2,550  
Net working capital adjustment (483)  
Fair value of purchase consideration 14,517  
Contingent payments $ 5,000  
Contingent consideration, liability   $ 200
Acquisition related costs   $ 400