Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Revenue Recognition - Reconciliation of Revenue from Segments to Consolidated (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Revenue, Net $ 59,353 $ 58,250
Block Programming—National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 11,461 12,034
Block Programming—Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,956 6,808
Spot Advertising—National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,660 3,957
Spot Advertising—Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 8,895 11,357
Infomercials [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 237 308
Network [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 4,871 4,388
Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 10,256 8,138
Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,697 1,523
Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,878 1,499
Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,217 2,594
Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,328 1,827
Self-Publishing fees [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,624 1,402
Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 68 103
Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 2,205 2,312
Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 58,730 57,633
Rental Income [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 623 617
Broadcast [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 44,048 45,180
Broadcast [Member] | Block Programming—National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 11,461 12,034
Broadcast [Member] | Block Programming—Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,956 6,808
Broadcast [Member] | Spot Advertising—National [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,660 3,957
Broadcast [Member] | Spot Advertising—Local [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 8,895 11,357
Broadcast [Member] | Infomercials [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 237 308
Broadcast [Member] | Network [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 4,871 4,388
Broadcast [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,781 3,326
Broadcast [Member] | Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 853 608
Broadcast [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 60  
Broadcast [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 286 282
Broadcast [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 89 76
Broadcast [Member] | Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net   1
Broadcast [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,899 2,035
Broadcast [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 43,425 44,563
Broadcast [Member] | Rental Income [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 623 617
Digital [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 9,619 9,104
Digital [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 4,413 4,713
Digital [Member] | Digital Streaming [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 844 915
Digital [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,479 1,245
Digital [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 2,773 2,135
Digital [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 31 28
Digital [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 79 68
Digital [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 9,619 9,104
Publishing [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 5,686 3,966
Publishing [Member] | Digital Advertising [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 62 99
Publishing [Member] | Digital Downloads and eBooks [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 339 254
Publishing [Member] | Subscriptions [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 158 177
Publishing [Member] | Book Sales and e-commerce, net of estimated sales returns and allowances [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 3,208 1,723
Publishing [Member] | Self-Publishing fees [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 1,624 1,402
Publishing [Member] | Advertising—Print [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 68 102
Publishing [Member] | Other Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net 227 209
Publishing [Member] | Transferred at Point in Time [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, Net $ 5,686 $ 3,966