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Note 10 - Share-based Compensation (Tables)
3 Months Ended
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   

Number

   

Weighted Average

 
   

of Shares

   

Exercise Price

 

Outstanding October 1, 2014

    2,530,535     $ 2.09  

Granted

    574,500     $ 2.86  

Forfeited/expired

    (13,333 )   $ 2.42  

Exercised

    -     $ -  

Outstanding December 31, 2014

    3,091,702     $ 2.23  

Exercisable December 31, 2014

    2,333,863     $ 2.20  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
   

Three months ended

 
   

December 31,

 
   

2014

   

2013

 

Cost of revenue

  $ 4,820     $ 2,058  

Selling, general and administrative

    105,222       131,176  

Research and development

    21,405       16,580  

Total

  $ 131,447     $ 149,814  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Three months ended

 
   

December 31,

 
    2014     2013    

Volatility

  53.0% - 62.0%     65.0% - 76.0%  

Risk-free interest rate

  1.3% - 1.6%     0.6% - 2.0%  

Forfeiture rate

    10.0%         10.0%    

Dividend yield

    0.0%         0.0%    

Expected life in years

  3.8 - 4.6     3.2 - 6.5