FINANCIAL INFORMATION Financial Information (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventory, Net	$ 32,111	$ 38,421
Assets	247,045	234,684
Accounts receivable, net of allowances of $1,268 and $11,142 at September 30, 2018 and December 31, 2017, respectively	50,998	40,134
Long-term deferred revenues	14,289	73,429
Liabilities	421,180	503,254
Deferred Revenue, Current	73,935	121,184
Accumulated deficit	(1,192,913)	(1,284,703)
Stockholders' Equity Attributable to Parent	$ (174,135)	(268,570)
Accounting Standards Update 2014-09 [Member]
Inventory, Net		32,705
Assets		257,500
Accounts receivable, net of allowances of $1,268 and $11,142 at September 30, 2018 and December 31, 2017, respectively		61,222
Long-term deferred revenues		18,350
Liabilities		417,703
Deferred Revenue, Current		79,573
Accumulated deficit		(1,176,336)
Stockholders' Equity Attributable to Parent		$ (160,203)