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Inventory
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Inventory

7. Inventory

Inventory as of March 31, 2013 and December 31, 2012 consisted of the following:

March 31, 2013

December 31, 2012

Raw materials and supplies

$

8,104,071

$

7,576,862

Work-in-process

503,148

314,321

Finished goods

1,483,255

659,274

$

10,090,474

$

8,550,457