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Note 7 - Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Note 7 - Shareholders Equity |  |
Option assumptions |
|  | Years Ended December 31,
|  | 2014 |  | 2013
Risk-free interest rate |  |  | 1.10 | % |  |  | 0.78 | %
Volatility factor |  |  | 50.70 | % |  |  | 61.94 | %
Dividends |  |  | 0.00 | % |  |  | 0.00 | %
Weighted average expected life (years) |  |  | 4.15 |  |  |  | 4.06 |
Forfeiture rate |  |  | 13.8 | % |  |  | 12.33 | %
Stock option activity |
Year Ended December 31, 2014
|  | Number of Shares |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Shares under option – January 1 |  |  | 2,131,622 |  |  | $ | 6.99 |  |  |  |  |  |  |  |  |
Options granted |  |  | 252,500 |  |  |  | 3.94 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (3,067 | ) |  |  | 3.67 |  |  |  |  |  |  |  |  |
Options forfeited or expired |  |  | (324,933 | ) |  |  | 6.77 |  |  |  |  |  |  |  |  |
Shares under option – December 31 |  |  | 2,056,122 |  |  | $ | 6.66 |  |  |  | 3.80 |  |  | $ | — |
Vested and expected to vest - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31 |  |  | 1,957,633 |  |  | $ | 5.33 |  |  |  | 3.70 |  |  | $ | — |
Options exercisable – December 31 |  |  | 1,296,619 |  |  | $ | 5.63 |  |  |  | 3.02 |  |  | $ | — |
Year Ended December 31, 2013
|  | Number of Shares |  | Weighted Average Exercise Price Per Share
Shares under option – January 1 |  |  | 2,211,488 |  |  | $ | 7.47 |
Options granted |  |  | 228,000 |  |  |  | 3.60 |
Options exercised |  |  | (3,000 | ) |  |  | 3.91 |
Options forfeited or expired |  |  | (304,866 | ) |  |  | 7.94 |
Shares under option – December 31 |  |  | 2,131,622 |  |  | $ | 6.99 |
Options exercisable – December 31 |  |  | 1,107,116 |  |  | $ | 6.32 |
Options - range of exercise prices |
|  | Option outstanding |  | Options exercisable
Range of Exercise Prices |  | Number of Outstanding Options – December 31, 2014 |  | Weighted-Average Remaining Contractual Life |  | Weighted- Average Exercise Price |  | Number of Options Exercisable at December 31, 2014 |  | Weighted- Average Exercise Price
| $3.22 - $3.99 |  |  |  | 654,700 |  |  |  | 4.64 |  |  | $ | 3.79 |  |  |  | 296,863 |  |  | $ | 3.74 |
| $4.00 - $4.99 |  |  |  | 417,750 |  |  |  | 3.45 |  |  | $ | 4.44 |  |  |  | 416,084 |  |  |  | 4.44 |
| $5.00 - $9.99 |  |  |  | 488,600 |  |  |  | 3.00 |  |  | $ | 6.44 |  |  |  | 488,600 |  |  |  | 6.44 |
| $10.00 - $15.00 |  |  |  | 495,072 |  |  |  | 3.78 |  |  | $ | 12.52 |  |  |  | 95,072 |  |  |  | 12.62 |
| $3.22 - $15.00 |  |  |  | 2,056,122 |  |  |  | 3.80 |  |  | $ | 6.66 |  |  |  | 1,296,619 |  |  | $ | 5.63 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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