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PURCHASED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Purchased intangible assets |  |
Gross | $ 54,499 | $ 54,796
Accumulated Amortization | (49,715) | (48,916)
Net | 4,784 | 5,880
Core technology |  |
Purchased intangible assets |  |
Gross | 17,374 | 17,717
Accumulated Amortization | (12,590) | (11,837)
Net | 4,784 | 5,880
Customer relationships |  |
Purchased intangible assets |  |
Gross | 35,131 | 35,091
Accumulated Amortization | (35,131) | (35,091)
Net | 0 | 0
Trademarks / Trade names |  |
Purchased intangible assets |  |
Gross | 1,994 | 1,988
Accumulated Amortization | (1,994) | (1,988)
Net | $ 0 | $ 0

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