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Debt - Schedule of Debt (Detail) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Total debt $ 13,500,000  
Less current portion (13,500,000) $ 0
Total long-term portion 0  
2012 Credit Facility [Member]    
Debt Instrument [Line Items]    
$40 million variable interest rate senior revolving credit facility maturing in 2016 $ 13,500,000 $ 0