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Acquisitions (HEE) - Additional Information (Detail) - HEE [Member] - USD ($)
 6 Months Ended 12 Months Ended
Aug. 13, 2014
Jun. 30, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Cash paid on acquisition $ 7,000,000    
Company's common stock 34,626    
Fair value of common stock issued $ 500,000    
Earn out expenses $ 2,000,000 $ 0 $ 0
Trading day period 30 days    
Restrictions on sale or transfer for periods range 6 months    
First year estimated earn-out payable   700,000  
Remainder of estimated earn-out payable   $ 1,300,000  
Thirty Trading Days [Member]      
Business Acquisition [Line Items]      
Fair value of common stock issued $ 500,000