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Note 4. Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2015
Notes to Financial Statements  
Schedule Of Stock Options
      Options Outstanding     Options Exercisable  
Exercise Price Range     Number    

Weighted Average

Remaining Contractual

Life (in Years)

   

Weighted Average

Exercise Price

    Number  
$ 0.01 - $1.00       19,700       6.56     $ 0.01       19,700  
$ 1.01 - $2.00       4,550       5.90     $ 1.70       4,550  
$ 2.01 - $3.00       14,000       2.35     $ 2.73       4,000  
$ 3.01 - $4.00       14,000       6.76     $ 3.33       14,000  
$ 4.01 - $8.00       98,750       5.82     $ 7.76       42,501  
$ 8.01 - $9.00       40,000       3.15     $ 8.25       20,000  
$ 9.01 - $10.00       14,000       9.49     $ 9.26       0  
$ 10.01 - $13.49       40,000       3.70     $ 13.49       12,500  
Total       245,000       5.16     $ 7.58       117,251