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Note 11 - Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
   

For the Three Months Ended

September 30,

   

For the Nine Months Ended

September 30,

 
   

2014

   

2013

   

2014

   

2013

 

Employee stock options

  $ (169

)

  $ 51     $ 208     $ 158  

Total stock-based compensation expense

  $ (169

)

  $ 51     $ 208     $ 158  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
   

For the Three Months Ended

September 30,

   

For the Nine Months Ended

September 30,

 
   

2014

   

2013

   

2014

   

2013

 

General and administrative

  $ (169

)

    51     $ 206     $ 146  

Sales, marketing and customer service

                2       11  

Engineering, design and product management

                      1  

Total stock-based compensation expense

  $ (169

)

  $ 51     $ 208     $ 158  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

For the Three Months

September 30,

   

For the Nine Months Ended

September 30,

 
   

2014

   

2013

   

2014

   

2013

 

Expected term

    4       3.75       4       3.75  

Risk-free interest rate

    1.25

%

    1.62

%

    1.25

%

    1.62

%

Volatility

    126

%

    106

%

    95

%

    106

%

Dividend yield

                       
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   

2014

   

2013

 
   

Shares

   

Weighted- Average Exercise Price Per Share

   

Shares

   

Weighted- Average Exercise Price Per Share

 

Outstanding as of January 1,

    7,114,250     $ 0.20       5,836,500     $ 0.45  

Granted

                       

Exercised

                       

Forfeited

    (559,250

)

    0.29       (1,251,000

)

    0.43  

Outstanding as of March 31,

    6,555,000     $ 0.19       4,585,500     $ 0.46  

Granted

    10,650,000       0.31              

Exercised

                       

Forfeited

    (357,500

)

    0.29       (1,255,250

)

    0.57  

Outstanding as of June 30,

    16,847,500     $ 0.27       3,330,250     $ 0.41  

Granted

    7,120,000       0.73       4,000,000     $ 0.05  

Exercised

    (345,000

)

    0.46              

Forfeited

    (3,763,500

)

    0.12       (836,000

)

    0.57  

Outstanding as of September 30,

    19,859,000     $ 0.46       6,494,250       0.21