SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Accounts Receivable, Net and Concentration Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	$ 4,159	$ 3,863
Provision for losses on accounts receivable	157	140
Direct write-offs, net of recoveries	(212)	(85)
Commission adjustments	768	241
Ending Balance	4,872	4,159
Concentration Risk [Line Items]
FDIC coverage	250
FDIC uninsured amount	$ 709	$ 284
Minimum [Member]
Accounts Receivable, Net [Abstract]
Threshold period for receivables due	30 days
Maximum [Member]
Accounts Receivable, Net [Abstract]
Threshold period for receivables due	90 days
GE Healthcare [Member] | Sales Representation Segment [Member]
Concentration Risk [Line Items]
Concentration risk	100.00%