INCOME TAXES - EFFECTIVE TAX RATE (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating Loss Carryforwards [Line Items]
Income tax (benefit) expense		$ (2,408)	$ 6	$ (2,384)	$ 15
Effective income tax rate, percent (as a percent)		67.80%	0.00%	25.80%	0.00%
Income tax expense, discontinued operations		$ 300		$ 1,200
Income tax expense, gain on disposal of the Core business	$ 15,469	13,200		15,500
Tax credit carryforward, valuation allowance		7,800		7,800
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		24,700		24,700
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		21,200		21,200
Research and Development Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount		$ 1,300		$ 1,300