Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Reconciliation of Revenue from Segments to Consolidated (Detail)

v3.20.4
Revenue Recognition - Reconciliation of Revenue from Segments to Consolidated (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]    
Revenue, Net $ 236,239 $ 253,898
Block Programming National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 47,009 48,465
Block Programming Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 24,267 30,502
Spot Advertising - National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 15,288 16,352
Spot Advertising - Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 39,407 51,824
Infomercials [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 974 1,409
Network [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 19,371 19,078
Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 36,997 33,441
Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 6,220 4,698
Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 10,720 7,122
Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 11,054 9,914
Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 10,806 12,537
Self-Publishing fees [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,424 5,474
Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 354 637
Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 8,348 12,445
Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 233,723 251,507
Rental Income [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 2,516 2,391
Broadcast [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 178,127 193,339
Broadcast [Member] | Block Programming National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 47,009 48,465
Broadcast [Member] | Block Programming Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 24,267 30,502
Broadcast [Member] | Spot Advertising - National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 15,288 16,352
Broadcast [Member] | Spot Advertising - Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 39,407 51,824
Broadcast [Member] | Infomercials [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 974 1,409
Broadcast [Member] | Network [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 19,371 19,078
Broadcast [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 15,938 12,582
Broadcast [Member] | Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 2,774 825
Broadcast [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,211  
Broadcast [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,166 1,107
Broadcast [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,438 378
Broadcast [Member] | Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1 28
Broadcast [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 7,283 10,789
Broadcast [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 175,611 191,010
Broadcast [Member] | Rental Income [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 2,516 2,329
Digital [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 39,593 39,165
Digital [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 20,644 20,454
Digital [Member] | Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,446 3,873
Digital [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,904 5,694
Digital [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 9,208 8,044
Digital [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 140 480
Digital [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 251 620
Digital [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 39,593 39,103
Digital [Member] | Rental Income [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net   62
Publishing [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 18,519 21,394
Publishing [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 415 405
Publishing [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,605 1,428
Publishing [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 680 763
Publishing [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 9,228 11,679
Publishing [Member] | Self-Publishing fees [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,424 5,474
Publishing [Member] | Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 353 609
Publishing [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 814 1,036
Publishing [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net $ 18,519 $ 21,394