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Selected Balance Sheet Accounts (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Property and Equipment    
Computer software and hardware and capitalized internal use software $ 17,576 $ 15,741
Furniture and equipment 1,450 1,419
Leasehold improvements 1,429 1,424
Property and equipment, gross 20,455 18,584
Less - Accumulated depreciation and amortization (15,436) (14,288)
Property and equipment, net $ 5,019 $ 4,296