Quarterly report pursuant to Section 13 or 15(d)

Sales (Detail)

v3.3.0.814
Sales (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Concentration Risk [Line Items]        
Disposal fee income     $ 39 $ 289
Recognition of gain from sale of deliveries under assignment       2,507
Revenue, Net, Total $ 8,491 $ 7,329 $ 34,091 $ 22,712
Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Disposal fee income, percent     0.10% 1.30%
Percent recognition of gain     0.00% 11.00%
Concentration Risk, Percentage     100.00% 100.00%
Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 34,052 $ 19,916
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     99.90% 87.70%
Company A [Member] | Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 6,671 $ 2,596
Company A [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     19.60% 11.40%
Company B [Member] | Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 6,098 $ 10,123
Company B [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     17.90% 44.60%
Company C [Member] | Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 5,094 $ 7,197
Company C [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     14.90% 31.70%
Company D [Member] | Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 4,343  
Company D [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     12.70% 0.00%
Company E [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 11,846  
Company E [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     34.80% 0.00%
Company A B C D [Member] | Sales Revenue, Goods, Net [Member]        
Concentration Risk [Line Items]        
Sales Revenue, Goods, Net     $ 22,206 $ 19,916
Company A B C D [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Concentration Risk [Line Items]        
Concentration Risk, Percentage     65.10% 87.70%