INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income before income taxes
Domestic									$ 1,331	$ 5,208	$ 3,913
Foreign									6,812	5,260	5,130
Income before taxes	$ 1,934	$ 2,761	$ 1,597	$ 1,851	$ 2,614	$ 3,198	$ 4,150	$ 506	8,143	10,468	9,043
Current:
Federal									2,934	3,535	3,917
State									728	478	339
Foreign									1,485	1,940	1,825
Total current provision									5,147	5,953	6,081
Deferred:
Federal									(1,851)	(1,477)	(1,609)
State									(120)	(102)	(86)
Foreign									13	(210)	(119)
Total deferred benefit									(1,958)	(1,789)	(1,814)
Total									$ 3,189	$ 4,164	$ 4,267
U.S. federal statutory income tax rate (as a percent)									35.00%	35.00%	35.00%
Differences between the effective tax rates reflected in the total provision for income taxes and the U.S. federal statutory rate
Tax provision (benefit) computed at 35%									$ 2,850	$ 3,664	$ 3,165
Nondeductible expenses									565	406	541
State income taxes, net of federal benefit									291	258	145
Tax impact of foreign operations									283	(138)	518
Release of uncertain tax positions									(704)	(242)	(14)
Other									(96)	216	(88)
Total									$ 3,189	$ 4,164	$ 4,267
Effective income tax rates (as a percent)									39.20%	39.80%	47.20%
Reversal of unrealized tax benefit liability									$ 800
Current deferred tax asset
Compensation related expenses	2,097				1,266				2,097	$ 1,266
Valuation allowance for deferred tax assets	(512)				(461)				(512)	(461)
Accruals and reserves	812				639				812	639
Total current deferred tax asset	2,397				1,444				2,397	1,444
Current deferred tax liability
Prepaids	(288)				(306)				(288)	(306)
Total current deferred tax liability	(288)				(306)				(288)	(306)
Net current deferred tax asset	2,109				1,138				2,109	1,138
Noncurrent deferred tax asset
Compensation related expenses	505				907				505	907
Foreign currency translation	3,731				2,629				3,731	2,629
Foreign tax credit carryovers	1,635				1,861				1,635	1,861
Foreign net operating loss carryovers	4,341				4,442				4,341	4,442
U.S. net operating loss carryovers	334				368				334	368
Other	508				392				508	392
Valuation allowance for deferred tax assets	(4,634)				(5,233)				(4,634)	(5,233)
Total noncurrent deferred tax asset	6,420				5,366				6,420	5,366
Noncurrent deferred tax liability
Depreciable assets	(135)				(165)				(135)	(165)
Intangible assets	(1,732)				(3,388)				(1,732)	(3,388)
Investment in foreign subsidiaries	(1,203)				(1,182)				(1,203)	(1,182)
Total noncurrent deferred tax liability	(3,070)				(4,735)				(3,070)	(4,735)
Net noncurrent deferred tax asset	3,350				631				3,350	631
Net deferred tax asset (liability)	5,459				1,769				5,459	1,769
Reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period
Balance, beginning of year				$ 2,192				$ 2,288	2,192	2,288	$ 2,470
Reductions as a result of tax positions taken during a prior period											(139)
Additions as a result of tax positions taken during the current period									205	146	110
Additions as a result of tax positions taken during a prior period									270
Reductions as a result of settlement with tax authorities											(139)
Reductions as a result of lapse of statute									(887)	(242)	(14)
Balance, end of year	1,780				$ 2,192				1,780	$ 2,192	$ 2,288
State income tax expense recognized of interest and penalties related to uncertain tax positions									500
Unrecognized tax benefits that would impact the company's effective tax rate	$ 1,800								$ 1,800