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Note 15 - Income Taxes - Reconciliation of the Total Amounts of Unrecognized Tax Benefits (Details) - USD ($) | 12 Months Ended
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Aug. 31, 2023 | Aug. 31, 2022
Stock-based compensation | $ 556,700 | $ 547,200
Gross unrecognized tax benefits – beginning balance | 319,000 | 297,600
Foreign tax credit carryforward | 4,036,000 | 4,892,100
Gross increases – prior period tax positions | 100 | 3,400
Capitalized research and experimentation | 1,106,000 | 0
Gross increases – current period tax positions | 42,100 | 18,000
Other credit and loss carryforward | 6,034,000 | 5,455,500
Gross unrecognized tax benefits – ending balance | 361,200 | 319,000
Other | 1,048,800 | 1,095,300
Total deferred tax assets | 12,781,500 | 11,990,100
Valuation allowance | (11,933,700) | (11,592,900)
Total deferred tax assets after valuation allowance | 847,800 | 397,200
Right-of-use asset | (66,200) | (98,300)
Intangible assets | (1,670,700) | (1,777,200)
Unremitted foreign earnings | (214,800) | (163,200)
Other | (201,215) | (58,500)
Total deferred tax liabilities | (2,152,915) | (2,097,200)
Net deferred tax liabilities | $ (1,305,115) | $ (1,700,000)

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