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Restructuring Charges and Asset Disposals (Details) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 29, 2012
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Restructuring reserves        
Beginning balance   $ 381,940 $ 381,940  
Expenses 444,285 495,207 939,492 2,986,441
Cash payments     (818,067)  
Non-cash charges     (250,146)  
Ending balance     253,219 381,940
Severance and benefit costs 2011 [Member]
        
Restructuring reserves        
Beginning balance   64,132 64,132  
Expenses     34,616  
Cash payments     (98,402)  
Non-cash charges     (346)  
Ending balance         
Lease liability costs 2011 [Member]
        
Restructuring reserves        
Beginning balance   317,808 317,808  
Expenses         
Cash payments         
Non-cash charges     (144,809)  
Ending balance     172,999  
Severance and benefit costs 2012 [Member]
        
Restructuring reserves        
Beginning balance          
Expenses     657,976  
Cash payments     (657,976)  
Non-cash charges         
Ending balance         
Lease liability costs 2012 [Member]
        
Restructuring reserves        
Beginning balance          
Expenses     150,625  
Cash payments     (61,689)  
Non-cash charges     (8,716)  
Ending balance     80,220  
Assets disposals 2012 [Member]
        
Restructuring reserves        
Beginning balance          
Expenses     96,275  
Cash payments         
Non-cash charges     (96,275)  
Ending balance