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Note 1 - Principles of Consolidation and Basis of Presentation (Tables)
3 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three Months Ended
 
   
September 30,
 
   
2020
   
2019
 
                 
Anti-dilutive stock options
   
-
     
50,000
 
Total anti-dilutive shares
   
-
     
50,000