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Components of Accrued Expenses (Detail) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Accrued Liabilities [Line Items]    
Accrued Wages and Related Costs $ 29,501 $ 31,197
Accrued Compensation 260,745 181,322
Accrued Professional Services 113,077 181,227
Accrued Warranty Obligations 65,253 93,788
Accrued Product Costs 97,900 0
Other Accrued Expenses 40,938 32,138
Total $ 607,414 $ 519,672