PROPERTY AND EQUIPMENT, NET Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Construction in Progress, Gross	$ 190	$ 235
Property, plant and equipment, gross	41,334	38,841
Less: acccumulated depreciation and amortization	34,839	31,800
Property and equipment, net	6,495	7,041
Capital lease obligation, current	72	65
Capital lease obligation, non-current	101	140
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,320	5,888
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,443	2,244
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,123	17,010
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,448	$ 13,699