Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions - Divestitures - Additional Information (Detail)

v3.19.1
Recent Transactions - Divestitures - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
Mar. 21, 2019
Feb. 28, 2019
Feb. 27, 2019
Apr. 30, 2018
Mar. 31, 2019
Mar. 31, 2018
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]            
Proceeds from sale of Other assets $ 900,000          
Gain (loss) on disposition of other assets $ 100,000          
Proceeds from sale of intangible assets         $ 1,255,000 $ 1,000
Time Brokerage Agreement [Member]            
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]            
Payments to acquire businesses, gross       $ 1,200,000    
Fee for not exercising purchase option       $ 100,000    
HumanEvents.Com [Member]            
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]            
Proceeds from sale of intangible assets     $ 300,000      
Gain (loss) on disposition of intangible assets     $ (200,000)      
Turner Investment Products [Member]            
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]            
Proceeds from sale of intangible assets   $ 0        
Gain (loss) on disposition of intangible assets   $ (200,000)