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Note 9 - Interest Dividend and Other Income (Tables)
3 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Interest and dividend income
  $
329,000
    $
199,000
 
Realized gain
   
     
25,000
 
Unrealized gain (loss)
   
10,000
     
(29,000
)
Other
   
1,000
     
39,000
 
    $
340,000
    $
234,000