COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Apr. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Contingent Consideration
Contingent acquisition liability	$ 3,890	$ 3,890		$ 6,073	$ 6,727	$ 4,019
Accrued expenses
Contingent Consideration
Severance Costs		200
Selling, general and administrative
Contingent Consideration
Severance Costs	300
Saugatuck Technology Inc.
Contingent Consideration
Contingent acquisition liability	600	600
Amount paid for contingent consideration			$ 500
Saugatuck Technology Inc. | Accrued expenses
Contingent Consideration
Contingent consideration classified as current	300	300
Experton Group
Contingent Consideration
Contingent acquisition liability	800	800
Amount expected to be paid in the second quarter of 2017 related to 2016 performance	100	100
Experton Group | Accrued expenses
Contingent Consideration
Contingent consideration classified as current	400	400
TracePoint
Contingent Consideration
Contingent acquisition liability	2,500	2,500
Amount paid for contingent consideration	2,100	2,100
TracePoint | Accrued expenses
Contingent Consideration
Contingent consideration classified as current	1,400	1,400
Alsbridge | Accrued expenses
Contingent Consideration
Contingent acquisition liability	$ 100	$ 100