INCOME TAXES Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Asset (Liability) [Line Items]
Valuation Allowances and Reserves, Deductions	$ 12,000
Deferred Tax Assets, Capital Loss Carryforwards	800
Tax credit and net operating loss carryforwards	283,473	$ 267,706
Allowances for bad debts	32	34
Revenues	3,666	18,057
Costs and expenses	17,033	16,149
Inventories	3,744	4,501
Acquired intangible assets	555	1,830
Gross deferred tax assets	308,503	308,277
Valuation allowance	(304,070)	(298,955)
Deferred tax assets after valuation allowance	4,433	9,322
Costs and expenses	(1,454)	(3,608)
Acquired intangible assets	(709)	(2,189)
Basis differerence convertible notes	(1,112)	(2,207)
Gross deferred tax liabilities	(3,275)	(8,004)
Net deferred tax assets (liabilities)	1,158	1,318
Long-term deferred tax assets, net (in other assets)	1,158	1,318
Long-term deferred tax liabilities, net	0	0
Net deferred tax assets (liabilities)	1,158	$ 1,318
US Federal and State [Member]
Deferred Tax Asset (Liability) [Line Items]
Tax credit carryforwards	50,900
Net operating loss carryforwards	787,000
Foreign [Member]
Deferred Tax Asset (Liability) [Line Items]
Tax credit carryforwards	5,500
Net operating loss carryforwards	147,100
Valuation allowance, tax credits	5,400
Valuation allowance, net operating losses	$ 145,600