Annual report pursuant to Section 13 and 15(d)

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

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Acquisitions and Recent Transactions - 2018 Acquisitions - Digital Media - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Aug. 09, 2018
Aug. 07, 2018
Apr. 19, 2018
Jul. 24, 2018
Dec. 31, 2018
Dec. 31, 2017
Mar. 01, 2017
Jan. 03, 2017
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business combination, consideration transferred         $ 11,180,000 $ 4,043,000    
Business combination, liabilities arising from contingencies, amount recognized             $ 500,000  
Goodwill         26,789,000 26,424,000   $ 25,613,000
Business combination, contingent consideration arrangements payment         (140,000) (14,000)    
Business combination acquisition related costs         200,000 $ 100,000    
Hilary Kramer Financial Newsletter [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business combination, consideration transferred $ 2,000,000              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, deferred subscription liabilities 1,500,000              
Payments to acquire businesses, gross 400,000              
Additional contingent earnout consideration paid 100,000              
Business combination, liabilities arising from contingencies, amount recognized 40,617              
Business combination liabilities arising from contingencies amount recognized discounted present value 39,360              
Goodwill $ 300,000              
Just1Word [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Business combination, liabilities arising from contingencies, amount recognized   $ 12,750            
Business combination liabilities arising from contingencies amount recognized discounted present value   12,212            
Business acquisition cost of acquired entity cash paid net   300,000            
Business combination, contingent consideration arrangements payment   $ 100,000            
Childrens Ministry Dealscom Website [Member]                
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                
Payments to acquire businesses, gross       $ 3,500,000        
Goodwill       700,000        
Business combination, consideration transferred       3,700,000        
Payment up on fulfillments of certain post-closing requirements       $ 200,000        
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   $ 70,000