INCOME TAXES - Narrative (Details)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Valuation Allowance [Line Items]
One time repatriation tax		$ 5,200,000
Measurement period adjustment, one time repatriation tax	$ 4,500,000
Measurement period adjustment, favorable impact in effective tax rate	0.011
Deferred tax asset, income tax expense due to Tax Cuts and Jobs Act		10,400,000
Tax expense from discontinued operations	$ 23,000,000	11,000,000	$ 7,400,000
Net operating loss	(61,700,000)	(45,700,000)	(8,000,000)
Valuation allowances	18,300,000	18,300,000
Deductible from state and foreign temporary tax differences	300,000
Undistributed earnings of its foreign subsidiaries	1,500,000
Uncertain tax positions	0
Unrecognized tax benefits, accrued interest and penalties	0	$ 0	$ 0
Foreign
Valuation Allowance [Line Items]
Net operating loss	9,200,000
Tax credit carryforward, amount	1,700,000
Net operating loss carryforwards, valuation allowance	9,200,000
Tax credit carryforward, valuation allowance	1,700,000
Federal
Valuation Allowance [Line Items]
Remaining net operating loss, utilization of carryforward from US federal	39,200,000
Net operating loss	0
State
Valuation Allowance [Line Items]
Net operating loss	9,100,000
Net operating loss carryforwards, valuation allowance	7,100,000
French tax authority
Valuation Allowance [Line Items]
Tax expense from discontinued operations	$ 23,000,000