PURCHASED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Purchased intangible assets
Gross	$ 55,701	$ 57,731
Accumulated Amortization	(53,310)	(54,066)
Net	2,391	3,665
Core technology
Purchased intangible assets
Gross	16,778	17,899
Accumulated Amortization	(14,387)	(14,234)
Net	2,391	3,665
Customer relationships
Purchased intangible assets
Gross	36,799	37,638
Accumulated Amortization	(36,799)	(37,638)
Net	0	0
Trademarks / Trade names
Purchased intangible assets
Gross	2,124	2,194
Accumulated Amortization	(2,124)	(2,194)
Net	$ 0	$ 0

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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
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