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Note 14 - Income Taxes (Tables)
12 Months Ended
Aug. 31, 2020
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
    Fiscal Year Ended August 31,
    2020   2019
Current:                
Federal   $
    $
 
State    
23,000
     
48,000
 
Foreign    
1,226,000
     
902,000
 
     
1,249,000
     
950,000
 
Deferred:                
Federal    
1,501,000
     
(315,000
)
State    
101,000
     
(21,000
)
Foreign    
(177,000
)    
228,000
 
     
1,425,000
     
(108,000
)
    $
2,674,000
    $
842,000
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
    Fiscal Year Ended August 31,
    2020   2019
Tax computed at statutory rates   $
365,000
    $
1,398,000
 
State income tax, net of federal benefit    
23,000
     
27,000
 
Tax effect on equity in income of international joint ventures    
(888,000
)    
(1,490,000
)
Tax effect of foreign operations    
641,000
     
672,000
 
Deemed repatriation    
108,000
     
204,000
 
Research and development credit    
(368,000
)    
(133,000
)
Valuation allowance    
2,797,000
     
133,000
 
Stock based compensation    
189,000
     
208,000
 
Non-controlling interest    
(55,000
)    
(74,000
)
Other    
(138,000
)    
(103,000
)
    $
2,674,000
    $
842,000
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
    August 31,
    2020   2019
Accrued compensation   $
173,500
    $
153,400
 
Inventory costs    
64,000
     
60,900
 
Other accrued expenses    
74,900
     
39,700
 
Lease liability    
147,500
     
-
 
Goodwill and other intangible assets    
581,200
     
688,400
 
Stock-based compensation    
397,300
     
299,300
 
Foreign tax credit carryforward    
5,790,500
     
5,790,500
 
Other credit and loss carryforwards    
4,824,200
     
3,631,700
 
Total deferred tax assets    
12,053,100
     
10,663,900
 
Valuation allowance    
(11,561,700
)    
(8,764,300
)
Total deferred tax assets after valuation allowance    
491,400
     
1,899,600
 
Property and equipment    
(50,700
)    
(111,900
)
Right-of-use asset    
(147,500
)    
-
 
Other    
(83,400
)    
(153,400
)
Total deferred tax liabilities    
(281,600
)    
(265,300
)
Net deferred tax assets   $
209,800
    $
1,634,300
 
Summary of Income Tax Contingencies [Table Text Block]
    Fiscal Year Ended August 31,
    2020   2019
Gross unrecognized tax benefits – beginning balance   $
248,000
    $
242,000
 
Gross increases – prior period tax positions    
15,200
     
1,000
 
Gross increases – current period tax positions    
15,000
     
5,000
 
Gross unrecognized tax benefits – ending balance   $
278,200
    $
248,000