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Investment in Quest Resource Management Group, LLC - Summary of Financial Condition and Operating Results of Quest Recycling Services (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Ownership Interests [Line Items]        
Net sales $ 42,514,265 $ 402,014 $ 80,674,315 $ 715,502
Gross profit 3,508,715 293,386 6,841,130 567,181
Income (loss) from operations (936,291) (2,120,158) (1,549,247) (4,120,145)
Net income (loss) (1,826,744) (2,309,223) (3,315,167) (5,606,828)
Quest Resource Management Group, LLC [Member]
        
Ownership Interests [Line Items]        
Net sales 42,326,342 32,253,788 80,298,981 62,904,852
Gross profit 3,320,873 2,572,054 6,465,796 5,869,408
Income (loss) from operations (89,557) 298,232 (68,195) 1,373,280
Net income (loss) $ (139,405) $ 206,310 $ (161,691) $ 1,157,902