Note 10 - Interest Dividend and Other Income (Tables)
 6 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   
For the Three Months
ended March 31,
    
For the
Six
Months
ended March 31,
  
   
2020
    
2019
    
2020
    
2019
  
Interest and dividend income
   $
320,000
     $
255,000
      
649,000
     $
454,000
  
Realized gain
    
—
      
—
    
––
      
25,000
  
Unrealized gain (loss)
    
(172,000
)
    
50,000
      
(162,000
)
    
21,000
  
Other
  
––
      
1,000
      
1,000
      
40,000
  
    $
148,000
     $
306,000
     $
488,000
     $
540,000