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Note 9 - Share-based Compensation (Tables)
3 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   

Number

of Shares

   

Weighted Average

Exercise Price

 

Outstanding October 1, 2013

    2,394,476     $ 1.89  

Granted

    682,500     $ 1.73  

Forfeited/expired

    (7,500 )   $ 1.93  

Exercised

    (357,476 )   $ .54  

Outstanding December 31, 2013

    2,712,000     $ 2.02  

Exercisable December 31, 2013

    1,957,140     $ 2.08  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
   

Three months ended

December 31,

 
   

2013

   

2012

 

Cost of revenue

  $ 2,058     $ 3,899  

Selling, general and administrative

    131,176       189,831  

Research and development

    16,580       12,248  

Total

  $ 149,814     $ 205,978  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Three months ended

December 31,

 
   

2013

   

2012

 

Volatility

   65.0% -  76.0%       81.0 %

Risk-free interest rate

   0.6% - 2.0%       0.9 %

Forfeiture rate

    10.0%         10.0 %

Dividend yield

    0.0%         0.0 %

Expected life in years

   3.2 -  6.5       6.4