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Disposal of Non-Core Products (Disposal of Non-Core Products) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Apr. 01, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Asset Purchase Agreement date |  |  |  |  | Apr. 01, 2019 |
Proceeds from sale of productive assets | $ 40,000 |  |  |  |  |
Selling, general and administrative |  | $ 24,414 | $ 30,978 |  | $ 81,610 | $ 94,088
Gain on disposal |  |  |  |  |  | 33,599
Non-core Switches and Connector Product [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |  |
Services provided income per agreement recognized as reduction to selling general and administrative expenses |  |  | 675 |  |  | 1,350
Disposal group, net sales |  | $ 0 | 10,770 |  | 0 | 19,824
Disposal group, operating income |  |  | 1,072 |  |  | 1,072
Cash received for reimbursement of retention costs on disposal |  |  | 170 |  |  | $ 170
Control Devices [Member] | Non-core Switches and Connector Product [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |  |
Selling, general and administrative |  |  |  | $ 322 |  |
Services provided income per agreement recognized as reduction to selling general and administrative expenses |  |  |  |  | $ 21 |
Disposal group, net sales |  |  | 4,160 |  |  |
Disposal group, cost of goods sold |  |  | 2,775 |  |  |
Gain on disposal |  |  | $ 33,921 |  |  |

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- Definition Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 + Details
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