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Goodwill and Intangible Assets - Goodwill and Intangible Assets Subject to Amortization (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 10,829 $ 11,231
Accumulated Amortization 10,265 9,944
Net Carrying Value 564 1,287
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 7,631 8,033
Accumulated Amortization 7,067 6,746
Net Carrying Value 564 1,287
Distribution rights    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 315 315
Accumulated Amortization 315 315
Net Carrying Value 0 0
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