Annual report pursuant to section 13 and 15(d)

Components of Deferred Tax Assets and Liabilities (Detail)

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Components of Deferred Tax Assets and Liabilities (Detail) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Schedule of Deferred Tax Assets and Liabilities [Line Items]    
Accounts receivable $ 194,000 $ 44,000
Inventories 809,000 305,000
Accrued expenses 281,000 58,000
Depreciation (44,000) (74,000)
Intangible assets (3,817,000) 44,000
Stock options 755,000 687,000
Deferred revenue (144,000)  
Other 2,000  
Net operating loss carry forwards 18,151,000 12,044,000
Deferred Tax Assets, Gross, Total 16,187,000 13,108,000
Valuation allowance (16,187,000) (13,108,000)
Deferred Tax Assets, Net, Total