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Note 9 - Accrued Liabilities (Tables)
12 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
2020
   
2019
 
Cooperative advertising and promotion allowances
  $
158,770
    $
188,985
 
Customer credit balances
   
16,363
     
65,937
 
Current deferred compensation
   
150,000
     
150,000
 
Employee benefits
   
80,399
     
60,178
 
Legal and professional fees
   
68,200
     
65,914
 
Bonus and profit-sharing
   
8,098
     
18,694
 
Sales commissions and bonuses
   
53,647
     
51,026
 
Other
   
44,622
     
49,779
 
Total accrued liabilities   $
580,099
    $
650,513