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Note 14 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
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Aug. 31, 2021 | Aug. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |
Foreign Withholding Tax | $ 113,000 | $ (76,000)
Tax Credit Carryforward, Foreign, Expirations in Period | 897,000 |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 1,065,500 |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 377,600 |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 247,500 |
Tax Credit Carryforward, Valuation Allowance | 11,447,500 | 11,561,700
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 114,000 | 2,797,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | 0 | 0
Foreign Tax Authority [Member] |  |
Tax Credit Carryforward, Amount | 4,893,300 | $ 5,790,500
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration | 223,300 |
Federal and State Tax [Member] |  |
Tax Credit Carryforward, Amount | $ 3,552,500 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates. + References No definition available. + Details
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