Annual report pursuant to Section 13 and 15(d)

Amortizable Intangible Assets - Summary of Significant Classes of Amortizable Intangible Assets (Detail)

v3.20.4
Amortizable Intangible Assets - Summary of Significant Classes of Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Cost $ 62,914 $ 62,717
Accumulated Amortization (58,897) (55,617)
Net 4,017 7,100
Customer Lists and Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 24,012 23,833
Accumulated Amortization (22,533) (21,823)
Net 1,479 2,010
Domain and Brand Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 20,350 20,332
Accumulated Amortization (19,127) (17,727)
Net 1,223 2,605
Favorable and Assigned Leases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,188 2,188
Accumulated Amortization (1,943) (1,920)
Net 245 268
Subscriber Base and Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 9,886 9,886
Accumulated Amortization (8,974) (8,251)
Net 912 1,635
Author Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,771 2,771
Accumulated Amortization (2,765) (2,609)
Net 6 162
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,041 2,041
Accumulated Amortization (1,954) (1,798)
Net 87 243
Other Amortizable Intangible Assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,666 1,666
Accumulated Amortization (1,601) (1,489)
Net $ 65 $ 177