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Goodwill and Intangible Assets - Goodwill and Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,204	$ 11,171
Accumulated Amortization	9,193	8,917
Net Carrying Value	2,011	2,254
Subscriber relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,007	7,977
Accumulated Amortization	6,154	5,958
Net Carrying Value	1,853	2,019
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	314	311
Accumulated Amortization	156	76
Net Carrying Value	158	235
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

X

- 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

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Amount before 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 928
-SubTopic 340
-Section 50
-Paragraph 1
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
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