Annual report pursuant to Section 13 and 15(d)

Recent Transactions - 2018 Acquisitions - Digital Media - Additional Information (Detail)

v3.20.1
Recent Transactions - 2018 Acquisitions - Digital Media - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 09, 2018
Aug. 07, 2018
Jul. 24, 2018
Apr. 19, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 03, 2017
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business combination, liabilities arising from contingencies, amount recognized               $ 500
Goodwill         $ 23,998 $ 26,789 $ 26,424  
Business combination acquisition related costs         $ 100 $ 200 $ 100  
Hilary Kramer Financial Newsletters [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business Combination, Consideration Transferred $ 2,000              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, deferred subscription liabilities 1,500              
Payments to acquire businesses, gross 400              
Additional contingent earnout consideration paid 100              
Business combination, liabilities arising from contingencies, amount recognized 40,617              
Business combination liabilities arising from contingencies amount recognized discounted present value 39,360              
Goodwill $ 300              
Just1Word [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business acquisition cost of acquired entity cash paid net   $ 300            
Business combination, contingent consideration arrangements payment   100            
Business combination, liabilities arising from contingencies, amount recognized   12,750            
Business combination liabilities arising from contingencies amount recognized discounted present value   $ 12,212            
Childrens Ministry Dealscom Website [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business Combination, Consideration Transferred     $ 3,700          
Payments to acquire businesses, gross     3,500          
Goodwill     700          
Payment up on fulfillments of certain post-closing requirements     $ 200          
Business Combination Cash Consideration Description     $0.2 million in cash within twelve months from the closing date provided that the seller meet certain post-closing requirements with regard to intellectual property.          
HearItFirst.com (Asset Purchase) [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Acquisition of domain name and related social media assets       $ 70,000