Inventories (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Summary of composition of inventories
Raw materials	$ 4,147,214	$ 4,055,812
Finished goods	6,224,986	5,472,771
Inventories, gross	10,372,200	9,528,583
Inventory reserves	(284,994)	(271,994)
Inventories, net	$ 10,087,206	$ 9,256,589

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