Inventories (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Schedule of Inventory [Line Items]
Finished products	$ 1,922,355	$ 2,509,797
Production materials	575,786	579,156
Total inventories	$ 2,498,141	$ 3,088,953

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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

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