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Note 6. Stock Options (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012
Notes to Financial Statements |  |
Summary of stock options issued |  |
|  | Number of Options Outstanding |  |  | Range of Exercise Price |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |
Balance at December 31, 2010 |  |  | 100,000 |  |  | $ | 2.10 - $2.32 |  |  | $ | 2.13 |  |  | $ | 16,700 |
Options granted |  |  | 30,000 |  |  | $ | 1.70 - $2.30 |  |  | $ | 1.82 |  |  | $ | 13,240 |
Options forfeited |  |  | (2,500 | ) |  | $ | 1.70 - $2.10 |  |  | $ | 1.78 |  |  | $ | 1,175 |
Balance at December 31, 2011 |  |  | 127,500 |  |  | $ | 1.70 - $2.32 |  |  | $ | 2.07 |  |  | $ | 24,590 |
Options granted |  |  | 196,000 |  |  | $ | 0.01 - $3.33 |  |  | $ | 1.37 |  |  | $ | 370,750 |
Options exercised |  |  | (25,154 | ) |  | $ | 1.70 - $2.10 |  |  | $ | 2.04 |  |  | $ | 35,661 |
Options expired or cancelled |  |  | (70,000 | ) |  | $ | 0.01 |  |  | $ | 0.01 |  |  | $ | 226,800 |
Options forfeited |  |  | (7,750 | ) |  | $ | 1.70 - $3.33 |  |  | $ | 2.45 |  |  | $ | 6,438 |
Balance at December 31, 2012 |  |  | 220,596 |  |  | $ | 0.01 - $3.33 |  |  | $ | 2.09 |  |  | $ | 257,835 |
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 |  | 27,300 |  | 8.31 |  | $0.01 |  | 27,300 |
$1.01 - $2.00 |  | 16,750 |  | 7.65 |  | $1.73 |  | 16,750 |
$2.01 - $3.00 |  | 111,276 |  | 6.46 |  | $2.41 |  | 72,526 |
$3.01 - $4.00 |  | 20,800 |  | 8.50 |  | $3.33 |  | 20,800 |
$4.01 - $8.00 |  | 60,000 |  | 9.99 |  | $7.76 |  | 3,751 |
$8.01 - $8.25 |  | 40,000 |  | 4.89 |  | $8.25 |  | 2,500 |
Total |  | 276,126 |  | 7.41 |  | $4.21 |  | 143,627 |
|  |  | Options Outstanding |  |  | Options Exercisable |
Exercise Price |  |  | Number |  |  | Weighted Average Remaining Contractual Life (in Years) |  |  | Number |
$ | 0.01 |  |  |  | 35,000 |  |  |  | 9.05 |  |  |  | 35,000 |
$ | 1.70 |  |  |  | 15,000 |  |  |  | 8.40 |  |  |  | 15,000 |
$ | 1.87 |  |  |  | 3,000 |  |  |  | 8.40 |  |  |  | 3,000 |
$ | 2.10 |  |  |  | 57,596 |  |  |  | 7.61 |  |  |  | 35,096 |
$ | 2.30 |  |  |  | 15,000 |  |  |  | 8.97 |  |  |  | 15,000 |
$ | 2.31 |  |  |  | 16,500 |  |  |  | 7.61 |  |  |  | 16,500 |
$ | 2.81 |  |  |  | 45,000 |  |  |  | 5.06 |  |  |  | 10,000 |
$ | 3.00 |  |  |  | 5,000 |  |  |  | 9.75 |  |  |  | 5,000 |
$ | 3.33 |  |  |  | 28,500 |  |  |  | 9.25 |  |  |  | 0 |
Total |  |  |  | 220,596 |  |  |  | 7.74 |  |  |  | 134,596 |
Schedule of Stock Options, Valuation Assumptions |  |
|  | Year ended December 31, 2012 |  |  | Year ended December 31, 2011 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | %
Expected stock price volatility |  |  | 131 | % |  |  | 157 | %
Weighted-average risk-free interest rate |  |  | 0.98 | % |  |  | 1.81 | %
Weighted-average expected life of options (in years) |  |  | 5.5 |  |  |  | 5.4 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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