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Note 15 - Income Taxes (Details) - Tax Effect of the Temporary Differences and Tax Carry Forwards Comprising Net Deferred Taxes: (USD $)
Aug. 31, 2013
Aug. 31, 2012
Current:    
Accrued bonus $ 277,300 $ 404,100
Allowance for doubtful accounts 7,200 7,200
Inventory costs 24,600 11,900
Prepaid expenses and other (31,200) (27,300)
Other accrued expenses 85,500 96,200
Deferred joint venture expenses 104,100 104,000
Total current 467,500 596,100
Noncurrent:    
Property and equipment (165,100) (159,500)
Goodwill 35,200 43,100
Other intangible assets 914,000 949,200
Nonqualified stock options 248,500 196,100
Foreign tax credit carryforward 4,253,900 3,438,300
Research and development credit 1,823,200 1,485,800
New hire retention credit 10,600 10,700
7,120,300 5,963,700
Valuation allowance (6,086,100) (4,933,100)
Total noncurrent $ 1,034,200 $ 1,030,600