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Note 15 - Income Taxes - Reconciliation of the Total Amounts of Unrecognized Tax Benefits (Details) - USD ($)
 12 Months Ended
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)