DISPOSITION OF THE CORE BUSINESS - CASH CONSIDERATION AND FAIR VALUE OF ASSETS DISPOSED (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	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross consideration from the sale of the Core Business	$ 97,000			$ 91,095	$ 0
Closing and transaction costs	5,905
Gross consideration from the sale of the Core Business	91,095
Core business disposition, current assets
Inventories, net	2,195	$ 0		0		$ 2,252
Prepaid expenses and other current assets	57
Total current assets	2,252	0		0		2,315
Property and equipment, net of depreciation	375
Non-current assets of discontinued operations	1,997	0		0		1,997
Total assets	4,249
Accrued inventory liability	2,305
Total current liabilities	2,305	0		0		$ 2,248
Total book value of the Core Business	6,554
Net gain on sale of the Core Business before taxes	(84,541)
Income tax expense, gain on disposal of the Core business	15,469	13,200		15,500
Gain on sale of the Core Business, net of tax	69,072	$ 69,072	$ 0	$ 69,072	$ 0
Purchased technology and license rights, net of depreciation
Core business disposition, current assets
Intangible assets	112
Brand name and trademark
Core business disposition, current assets
Intangible assets	$ 1,510