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Note 11 (Tables)
9 Months Ended
Jun. 30, 2018
Notes Tables  
Unrealized Gain (Loss) on Investments [Table Text Block]
   
 
 
 
 
Gross
   
Gross
   
Fair
 
   
Amortized
   
Unrealized
   
Unrealized
   
Market
 
   
Cost
   
Gains
   
Losses
   
Value
 
   
(in thousands)
 
                                 
Corporate Bonds
  $
126,939
    $
8
    $
1,600
    $
125,347
 
Certificates of Deposit
   
6,880
     
-
     
8
     
6,872
 
Total marketable securities held to maturity
  $
133,819
    $
8
    $
1,608
    $
132,219
 
   
 
 
 
 
Gross
   
Gross
   
Fair
 
   
Amortized
   
Unrealized
   
Unrealized
   
Market
 
   
Cost
   
Gains
   
Losses
   
Value
 
   
(in thousands)
 
                                 
Mutual Funds
  $
12,954
    $
-
    $
385
    $
12,569
 
Preferred Stock
   
16,035
     
344
     
40
     
16,339
 
Total marketable securities available for sale
  $
28,989
    $
344
    $
425
    $
28,908
 
   
 
 
 
 
Gross
   
Gross
   
Fair
 
   
Amortized
   
Unrealized
   
Unrealized
   
Market
 
   
Cost
   
Gains
   
Losses
   
Value
 
   
(in thousands)
 
Corporate Bonds
  $
114,101
    $
424
    $
155
    $
114,370
 
Certificates of Deposit
   
5,920
     
18
     
1
     
5,937
 
Total marketable securities held to maturity
  $
120,021
    $
442
    $
156
    $
120,307
 
   
 
 
 
 
Gross
   
Gross
   
Fair
 
   
Amortized
   
Unrealized
   
Unrealized
   
Market
 
   
Cost
   
Gains
   
Losses
   
Value
 
   
(in thousands)
 
                                 
Mutual Funds
  $
13,003
    $
77
    $
240
    $
12,840
 
Preferred Stock
   
16,791
     
711
     
82
     
17,420
 
Total marketable securities available for sale
  $
29,794
    $
788
    $
322
    $
30,260
 
Investments Classified by Contractual Maturity Date [Table Text Block]
   
June 30, 2018
   
September 30, 2017
 
                                 
   
 
 
 
 
Fair
   
 
 
 
 
Fair
 
   
Amortized
   
Market
   
Amortized
   
Market
 
   
Cost
   
Value
   
Cost
   
Value
 
   
(in thousands)
 
Due in one year or less
  $
30,271
    $
30,200
    $
59,113
    $
59,194
 
Due after one year through five years
   
103,548
     
102,019
     
60,908
     
61,113
 
Due after five years through ten years
   
-
     
-
     
-
     
-
 
Total held to maturity securities
  $
133,819
    $
132,219
    $
120,021
    $
120,307
 
Less current portion
   
30,271
     
30,200
     
59,113
     
59,194
 
Long term held to maturity securities
  $
103,548
    $
102,019
    $
60,908
    $
61,113