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Selected Balance Sheet Accounts (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Property and Equipment    
Computer software and hardware and capitalized internal use software $ 15,741 $ 12,990
Furniture and equipment 1,419 1,271
Leasehold improvements 1,424 957
Property and equipment, gross 18,584 15,218
Less - Accumulated depreciation and amortization (14,288) (13,314)
Property and equipment, net $ 4,296 $ 1,904