PURCHASED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Purchased intangible assets
Gross	$ 57,545	$ 58,069
Accumulated Amortization	(50,170)	(49,480)
Net	7,375	8,589
Core technology
Purchased intangible assets
Gross	18,803	18,916
Accumulated Amortization	(11,428)	(10,866)
Net	7,375	8,050
Customer relationships
Purchased intangible assets
Gross	36,725	37,122
Accumulated Amortization	(36,725)	(36,583)
Net	0	539
Trademarks / Trade names
Purchased intangible assets
Gross	2,017	2,031
Accumulated Amortization	(2,017)	(2,031)
Net	$ 0	$ 0

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+ References

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-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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