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Restructuring Charges and Asset Disposals - Restructuring Reserves (Detail) (USD $)
 0 Months Ended 3 Months Ended 12 Months Ended
Jun. 29, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]          
Beginning balance     $ 253,219    
Expenses 444,285 495,207 521,903 939,492 2,986,441
Cash payments     (598,159)    
Non-cash charges     (87,161)    
Ending balance     89,802 253,219  
Lease Liability Costs 2011 [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance     172,999    
Expenses     (120,703)    
Cash payments           
Non-cash charges     (52,296)    
Ending balance           
Lease Liability Costs 2012 [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance     80,220    
Expenses           
Cash payments     (22,112)    
Non-cash charges     (34,865)    
Ending balance     23,243    
Severance and Benefit Costs 2013 [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance           
Expenses     642,606    
Cash payments     (576,047)    
Non-cash charges           
Ending balance     $ 66,559