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Segment Reporting (Details 2) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Segment Reporting      
Net sales $ 33,697,014 $ 31,952,223  
Operating income 2,956,257 3,688,300  
Depreciation / amortization 973,586 681,449  
Capital expenditures 1,251,658 2,309,282  
Total assets 99,067,965 80,345,484 98,617,440
Engineered Packaging
     
Segment Reporting      
Net sales 10,865,306 9,617,822  
Operating income 193,631 454,656  
Depreciation / amortization 645,748 328,645  
Capital expenditures 500,014 1,835,570  
Total assets 34,448,170 22,038,608  
Component Products
     
Segment Reporting      
Net sales 22,831,708 22,334,401  
Operating income 2,762,626 3,233,644  
Depreciation / amortization 327,838 352,804  
Capital expenditures 751,644 473,712  
Total assets 32,678,098 30,690,457  
Unallocated Assets
     
Segment Reporting      
Total assets $ 31,941,697 $ 27,616,419