Inventory (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Inventories
Raw materials	$ 8,392,602	$ 9,689,172
Work-in-process	107,078	131,492
Finished goods	3,927,553	3,492,167
Reserve for excess and obsolete inventory	(586,843)	(2,319,622)
Total inventory	$ 11,840,390	$ 10,993,209

The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ Details