PURCHASED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Purchased intangible assets
Gross	$ 59,086	$ 61,420
Accumulated Amortization	(49,571)	(48,559)
Net	9,515	12,861
Core technology
Purchased intangible assets
Gross	19,436	20,027
Accumulated Amortization	(10,771)	(10,333)
Net	8,665	9,694
Customer relationships
Purchased intangible assets
Gross	37,564	39,244
Accumulated Amortization	(36,714)	(36,077)
Net	850	3,167
Trademarks / Trade names
Purchased intangible assets
Gross	2,086	2,149
Accumulated Amortization	(2,086)	(2,149)
Net	$ 0	$ 0

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