INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Tax open years subject to examination [Line Items]
Income tax benefit (provision)	$ 65	$ 172
Pre-tax income (loss)	$ (1,706)	$ (2,725)
Effective income tax rate	(3.80%)	(6.30%)
Unrecognized tax benefits	$ 2,036		$ 1,982
Accrued interest and penalties	639		$ 588
Unrecognized tax benefits, income tax penalties and interest expense	$ 44	$ 14
U.S. Federal
Tax open years subject to examination [Line Items]
Open tax year	2015
Majority of U.S. state and local jurisdictions
Tax open years subject to examination [Line Items]
Open tax year	2014
Australia
Tax open years subject to examination [Line Items]
Open tax year	2017
Belgium
Tax open years subject to examination [Line Items]
Open tax year	2016
Canada
Tax open years subject to examination [Line Items]
Open tax year	2014
Netherlands
Tax open years subject to examination [Line Items]
Open tax year	2013
Switzerland
Tax open years subject to examination [Line Items]
Open tax year	2014
United Kingdom
Tax open years subject to examination [Line Items]
Open tax year	2017
Jurisdictions in Asia
Tax open years subject to examination [Line Items]
Open tax year	2018
Minimum
Tax open years subject to examination [Line Items]
Possible decrease of unrecognized tax benefits	$ 0
Maximum
Tax open years subject to examination [Line Items]
Possible decrease of unrecognized tax benefits	$ 200