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Note 6 - Reportable Segments (Tables)
12 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
Reportable Segments
                 
   
Traditional
Business
   
Journal
Technologies
   
 
Corporate
   
 
Total
 
Fiscal 2018
                               
Revenues
                               
Advertising, net
  $
9,112,000
    $
---
    $
---
    $
9,112,000
 
Circulation
   
5,401,000
     
---
     
---
     
5,401,000
 
Advertising service fees and other
   
2,659,000
     
---
     
---
     
2,659,000
 
Licensing and maintenance fees
   
---
     
17,225,000
     
---
     
17,225,000
 
Consulting fees
   
---
     
2,832,000
     
---
     
2,832,000
 
Other public service fees
   
---
     
3,474,000
     
---
     
3,474,000
 
Operating expenses
   
16,840,000
     
37,923,000
     
---
     
54,763,000
 
Income (loss) from operations
   
332,000
     
(14,392,000
)    
---
     
(14,060,000
)
Dividends and interest income
   
---
     
---
     
4,808,000
     
4,808,000
 
Other income
   
---
     
---
     
37,000
     
37,000
 
Interest expense on note payable collateralized by real estate
   
(95,000
)    
---
     
---
     
(95,000
)
Interest expense on margin loans
   
---
     
---
     
(651,000
)    
(651,000
)
Capital gains on sales of marketable securities and others
   
---
     
---
     
3,182,000
     
3,182,000
 
Other-than-temporary impairment losses on investments
   
---
     
---
     
(4,560,000
)    
(4,560,000
)
Pretax (loss) income
   
237,000
     
(14,392,000
)    
2,816,000
     
(11,339,000
)
Income tax benefit
   
490,000
     
695,000
     
18,355,000
     
19,540,000
 
Net (loss) income
   
727,000
     
(13,697,000
)    
21,171,000
     
8,201,000
 
Total assets
   
19,602,000
     
29,885,000
     
214,511,000
     
263,998,000
 
Capital expenditures
   
212,000
     
---
     
---
     
212,000
 
Amortization of intangible assets
   
---
     
3,058,000
     
---
     
3,058,000
 
   
Reportable Segments
                 
   
Traditional
Business
   
Journal
Technologies
   
 
Corporate
   
 
Total
 
Fiscal 2017
                               
Revenues
                               
Advertising, net
  $
9,104,000
    $
---
    $
---
    $
9,104,000
 
Circulation
   
5,654,000
     
---
     
---
     
5,654,000
 
Advertising service fees and other
   
2,812,000
     
---
     
---
     
2,812,000
 
Licensing and maintenance fees
   
---
     
16,037,000
     
---
     
16,037,000
 
Consulting fees
   
---
     
4,476,000
     
---
     
4,476,000
 
Other public service fees
   
---
     
3,301,000
     
---
     
3,301,000
 
Operating expenses
   
17,852,000
     
36,699,000
     
---
     
54,551,000
 
Loss from operations
   
(282,000
)    
(12,885,000
)    
---
     
(13,167,000
)
Dividends and interest income
   
---
     
---
     
4,844,000
     
4,844,000
 
Other income
   
22,000
     
---
     
12,000
     
34,000
 
Interest expense on note payable collateralized by real estate
   
(100,000
)    
---
     
---
     
(100,000
)
Interest expense on margin loans
   
---
     
---
     
(422,000
)    
(422,000
)
Interest and penalty expense reversal for uncertain and unrecognized tax benefits
   
---
     
743,000
     
---
     
743,000
 
Pretax (loss) income
   
(360,000
)    
(12,142,000
)    
4,434,000
     
(8,068,000
)
Income tax benefit (expense)
   
(2,000
)    
7,910,000
     
(758,000
)    
7,150,000
 
Net (loss) income
   
(362,000
)    
(4,232,000
)    
3,676,000
     
(918,000
)
Total assets
   
16,606,000
     
33,461,000
     
230,641,000
     
280,708,000
 
Capital expenditures
   
160,000
     
93,000
     
---
     
253,000
 
Amortization of intangible assets
   
---
     
4,895,000
     
---
     
4,895,000
 
   
Reportable Segments
                 
   
Traditional
Business
   
Journal
Technologies
   
 
Corporate
   
 
Total
 
Fiscal 2016
                               
Revenues
                               
Advertising, net
  $
9,854,000
    $
---
    $
---
    $
9,854,000
 
Circulation
   
5,912,000
     
---
     
---
     
5,912,000
 
Advertising service fees and other
   
2,651,000
     
---
     
---
     
2,651,000
 
Licensing and maintenance fees
   
---
     
14,758,000
     
---
     
14,758,000
 
Consulting fees
   
---
     
4,085,000
     
---
     
4,085,000
 
Other public service fees
   
---
     
4,352,000
     
---
     
4,352,000
 
Operating expenses
   
17,240,000
     
31,012,000
     
---
     
48,252,000
 
Income (loss) from operations
   
1,177,000
     
(7,817,000
)    
---
     
(6,640,000
)
Dividends and interest income
   
---
     
---
     
4,085,000
     
4,085,000
 
Other income
   
52,000
     
---
     
9,000
     
61,000
 
Interest expense on note payable collateralized by real estate
   
(88,000
)    
---
     
---
     
(88,000
)
Interest expense on margin loans
   
---
     
---
     
(284,000
)    
(284,000
)
Interest expense accrued for uncertain and unrecognized tax benefits
   
---
     
(112,000
)    
---
     
(112,000
)
Pretax income (loss)
   
1,141,000
     
(7,929,000
)    
3,810,000
     
(2,978,000
)
Income tax benefit (expense)
   
(530,000
)    
3,140,000
     
(675,000
)    
1,935,000
 
Net income (loss)
   
611,000
     
(4,789,000
)    
3,135,000
     
(1,043,000
)
Total assets
   
17,644,000
     
39,786,000
     
168,016,000
     
225,446,000
 
Capital expenditures, including purchase of Logan building
   
3,662,000
     
117,000
     
---
     
3,779,000
 
Amortization of intangible assets
   
142,000
     
4,895,000
     
---
     
5,037,000