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Goodwill and Intangible Assets Goodwill and Intangible Assets Assets subject to Amortization (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 14,705 | $ 14,794
Accumulated Amortization | 9,865 | 9,133
Net Carrying Value | 4,840 | 5,661
Subscriber relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 7,667 | 7,678
Accumulated Amortization | 5,050 | 4,519
Net Carrying Value | 2,617 | 3,159
Distribution rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 4,155 | 4,233
Accumulated Amortization | 1,932 | 1,731
Net Carrying Value | 2,223 | 2,502
Internally developed software |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 446 | 446
Accumulated Amortization | 446 | 446
Net Carrying Value | 0 | 0
Proprietary content |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 153 | 153
Accumulated Amortization | 153 | 153
Net Carrying Value | 0 | 0
Intellectual property |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,284 | 2,284
Accumulated Amortization | 2,284 | 2,284
Net Carrying Value | $ 0 | $ 0

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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