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Note 1 - Principles of Consolidation and Basis of Presentation (Tables)
6 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

Three Months Ended

  

Six Months Ended

 
  

December 31,

  

December 31,

 
  

2021

  

2020

  

2021

  

2020

 
                 

Anti-dilutive stock options

  115,000   770,000   115,000   770,000 

Total anti-dilutive shares

  115,000   770,000   115,000   770,000