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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2017	Mar. 31, 2022	Mar. 31, 2021	Jan. 01, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired		$ 14	$ 16
Amortization expense		$ 194	$ 276
Weighted average remaining useful lives		1 year 3 months 18 days
Headland Media Limited | Subscriber relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful lives		10 years
Q1 2017 Acquisition
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired		$ 422
Contingent consideration, value, high				$ 114
Q1 2017 Acquisition | Subscriber relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful lives	10 years
Finite-lived intangible assets acquired	$ 100

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
-Section 50
-Paragraph 1
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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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