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Note 11. Shareholder's Equity (Tables)
12 Months Ended
Sep. 30, 2012
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Stock Options
   
Stock Warrants
 
   
Options
   
Weighted
Average
Exercise
Price
   
Warrants
   
Weighted
Average
Exercise
Price
 
                         
Outstanding, September 30, 2010
    2,345,705     $ 1.01       302,000     $ 5.58  
Granted
    692,000     $ 1.20       114,000     $ 1.47  
Exercised
    (117,999 )   $ 1.03              
Forfeited or expired
    (639,502 )   $ 1.24       (209,000 )   $ 4.71  
Outstanding, September 30, 2011
    2,280,204     $ 1.00       207,000     $ 4.13  
Granted
    2,094,667     $ 0.80       217,931     $ 1.40  
Exercised
    (157,921 )   $ 0.84              
Forfeited or expired
    (1,227,330 )   $ 1.00       (93,000 )   $ 7.39  
Outstanding, September 30, 2012
    2,989,620     $ 0.86       331,931     $ 1.42  
Schedule of Nonvested Share Activity [Table Text Block]
   
Shares
   
Weighted
Average
Grant-Date
Fair Value
 
Nonvested at September 30, 2011
    1,229,261     $ 1.05  
Granted
    2,094,667       0.80  
Vested
    (419,264 )     0.94  
Forfeited
    (943,607 )     0.99  
Nonvested at September 30, 2012
    1,961,057     $ 0.83  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
Outstanding Options
   
Exercisable Options
 
Exercise
Price
 
Number
of
Options
   
Weighted
Average
Remaining
Contractual
Life (Years)
   
Weighted
Average
Exercise
Price
   
Number
of
Options
Exercisable
   
Weighted
Average
Exercise
Price
 
$0.01
to $0.75     1,359,667       9.04     $ 0.65       44,000     $ 0.68  
$0.76
to $1.00     1,053,703       6.67       0.89       853,703       0.90  
$1.01
to $1.10     79,000       7.80       1.08       47,004       1.07  
$1.11
to $3.00     497,250       9.00       1.35       83,856       1.20  
          2,989,620       8.17     $ 0.86       1,028,563     $ 0.92  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
Year Ended September 30,
 
   
2012
   
2011
 
Expected option life in years
      6.0           6.5    
Expected volatility
      65.00%           56.00%    
Expected dividend rate
      0.00%           0.00%    
Risk free interest rate
      1.13           1.86    
Option exercise prices
    $0.59 to $1.48       $1.00 to $1.58  
Weighted average fair value of options granted during the year
      $0.51           $0.67