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Property and Equipment - Additional Information (Detail)
12 Months Ended
Dec. 31, 2015
USD ($)
Radio_Stations
Dec. 31, 2014
USD ($)
Property, Plant and Equipment [Line Items]    
Depreciation and amortization expense $ 3,834,992 $ 2,525,951
Broadcast Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Number of radio towers leased for radio stations under separate lease agreements | Radio_Stations 2  
Capital leased property and equipment $ 800,000