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Selected Balance Sheet Accounts (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Property and Equipment    
Computer software and hardware $ 12,106 $ 12,027
Capitalized internal use software 5,467 5,359
Furniture and equipment 1,619 1,332
Leasehold improvements 1,422 1,139
Property and equipment, gross 20,614 19,857
Less - Accumulated depreciation and amortization (16,110) (15,427)
Property and equipment, net $ 4,504 $ 4,430