Inventories (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Inventory [Line Items]
Raw materials	$ 6,160,860	$ 6,109,807
Work-in-process	2,016,882	777,056
Finished goods	2,180,056	1,396,609
Total	$ 10,357,798	$ 8,283,472

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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+ References

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

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