Quarterly report pursuant to Section 13 or 15(d)

Segment Data - Schedule of Segment Data (Detail)

v3.10.0.1
Segment Data - Schedule of Segment Data (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Depreciation $ 3,032 $ 3,082   $ 9,076 $ 9,171    
Amortization 1,604 1,135   4,558 3,420    
Change in the estimated fair value of contingent earn-out consideration   (12)   72 (54)    
Impairment of indefinite-lived long-term assets other than goodwill     $ 19 0 19    
Net (gain) loss on the disposition of assets 759 (95)   (4,400) 410    
Net operating income (loss) 6,275 5,005   13,289 18,443    
Inventories, net 891     891   $ 730  
Property and equipment, net 96,712     96,712   99,480  
Broadcast licenses 379,182     379,182   380,914 $ 388,517
Goodwill 26,789     26,789   26,424 $ 25,613
Other indefinite-lived intangible assets 313     313   313  
Digital Media [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Goodwill 986     986      
Operating Segments [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Net revenue 65,528 65,433   195,595 196,525    
Operating expenses 55,376 56,128   164,200 165,936    
Net operating income (loss) before depreciation, amortization and net loss on the disposition of assets 10,152 9,305   31,395 30,589    
Depreciation 3,032 3,082   9,076 9,171    
Amortization 1,604 1,135   4,558 3,420    
Change in the estimated fair value of contingent earn-out consideration   (12)   72 (54)    
Impairment of indefinite-lived long-term assets other than goodwill         19    
Net (gain) loss on the disposition of assets (759) 95   4,400 (410)    
Net operating income (loss) 6,275 5,005   13,289 18,443    
Inventories, net 891     891   730  
Property and equipment, net 96,712     96,712   99,480  
Broadcast licenses 379,182     379,182   380,914  
Goodwill 26,789     26,789   26,424  
Other indefinite-lived intangible assets 313     313   313  
Amortizable intangible assets, net 12,899     12,899   13,104  
Operating Segments [Member] | Broadcast [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Net revenue 48,812 48,424   147,425 145,479    
Operating expenses 37,158 37,040   110,151 108,807    
Net operating income (loss) before depreciation, amortization and net loss on the disposition of assets 11,654 11,384   37,274 36,672    
Depreciation 1,923 1,920   5,692 5,668    
Amortization 9 11   29 46    
Net (gain) loss on the disposition of assets (759) 97   4,400 (399)    
Net operating income (loss) 10,481 9,356   27,153 31,357    
Property and equipment, net 81,552     81,552   83,901  
Broadcast licenses 379,182     379,182   380,914  
Goodwill 2,960     2,960   3,581  
Amortizable intangible assets, net 312     312   351  
Operating Segments [Member] | Digital Media [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Net revenue 10,397 10,446   31,051 31,998    
Operating expenses 8,021 8,169   24,792 25,241    
Net operating income (loss) before depreciation, amortization and net loss on the disposition of assets 2,376 2,277   6,259 6,757    
Depreciation 777 792   2,346 2,389    
Amortization 1,370 860   3,818 2,494    
Change in the estimated fair value of contingent earn-out consideration   (12)   72 (54)    
Net operating income (loss) 229 637   23 1,928    
Inventories, net 336     336   313  
Property and equipment, net 6,442     6,442   6,173  
Goodwill 21,933     21,933   20,947  
Amortizable intangible assets, net 10,347     10,347   9,801  
Operating Segments [Member] | Publishing [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Net revenue 6,319 6,563   17,119 19,048    
Operating expenses 6,210 6,686   17,319 18,705    
Net operating income (loss) before depreciation, amortization and net loss on the disposition of assets 109 (123)   (200) 343    
Depreciation 128 159   388 515    
Amortization 225 264   710 879    
Impairment of indefinite-lived long-term assets other than goodwill         19    
Net (gain) loss on the disposition of assets         (9)    
Net operating income (loss) (244) (546)   (1,298) (1,061)    
Inventories, net 555     555   417  
Property and equipment, net 1,000     1,000   1,281  
Goodwill 1,888     1,888   1,888  
Other indefinite-lived intangible assets 313     313   313  
Amortizable intangible assets, net 2,237     2,237   2,947  
Operating Segments [Member] | Unallocated Corporate [Member]              
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]              
Operating expenses 3,987 4,233   11,938 13,183    
Net operating income (loss) before depreciation, amortization and net loss on the disposition of assets (3,987) (4,233)   (11,938) (13,183)    
Depreciation 204 211   650 599    
Amortization       1 1    
Net (gain) loss on the disposition of assets   (2)     (2)    
Net operating income (loss) (4,191) $ (4,442)   (12,589) $ (13,781)    
Property and equipment, net 7,718     7,718   8,125  
Goodwill 8     8   8  
Amortizable intangible assets, net $ 3     $ 3   $ 5