Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Inventories (Detail)

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Summary of Significant Accounting Policies - Inventories (Detail) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Accounting Policies [Abstract]    
Finished goods $ 2,398,038 $ 2,143,176
Work in process 192,260 145,156
Raw materials 869,766 862,777
Inventory, Net $ 3,460,064 $ 3,151,109