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Stock Option/Stock Issuance Plan (Tables) | 12 Months Ended
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Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
2004 Equity Incentive Plan information |
|  |  | Outstanding Options
| Options Available For Grant |  | Number of Shares |  | Weighted Average Price Per Share
Balance at December 31, 2009 |  | 73,750 |  |  | 849,339 |  | $ | 6.27
Increase in shares authorized |  | 151,550 |  |  | — |  |  |
Transferred from 1995 Plan |  | 301,345 |  |  | — |  |  |
Granted |  | (858,950 | ) |  | 858,950 |  | $ | 3.00
Exercised |  | — |  |  | (12,951 | ) | $ | 1.96
Canceled |  | 502,548 |  |  | (502,548 | ) | $ | 2.15
Balance at December 31, 2010 |  | 170,243 |  |  | 1,192,790 |  | $ | 2.88
Increase in shares authorized |  | 152,079 |  |  | — |  |  |
Granted |  | (305,450 | ) |  | (305,450 | ) | $ | 1.92
Exercised |  | — |  |  | (14,451 | ) | $ | 2.06
Canceled |  | 73,699 |  |  | (73,699 | ) | $ | 2.42
Balance at December 31, 2011 |  | 90,571 |  |  | 1,410,090 |  | $ | 2.70
Increase in shares authorized |  | 193,283 |  |  | — |  |  |
Granted |  | (409,900 | ) |  | 409,900 |  | $ | 1.73
Exercised |  | — |  |  | (7,318 | ) | $ | 1.92
Canceled |  | 188,484 |  |  | (188,484 | ) | $ | 2.65
Balance at December 31, 2012 |  | 62,438 |  |  | 1,624,188 |  | $ | 2.47
2004 Plan outstanding and exercisable options by price range |
| Options Outstanding |  | Options Exercisable
Range of Exercise Prices | Number of Options Outstanding |  | Weighted Average Remaining Life (Years) |  | Weighted Average Exercise Price |  | Number of Options Exercisable |  | Weighted Average Exercise Price
$1.03 - $1.20 |  | 194,600 |  |  | 9.92 |  | $ | 1.09 |  |  | 83,668 |  | $ | 1.13
$1.68 - $1.82 |  | 161,823 |  |  | 8.17 |  | $ | 1.82 |  |  | 73,349 |  | $ | 1.82
$1.95 - $2.12 |  | 227,110 |  |  | 6.75 |  | $ | 1.99 |  |  | 210,537 |  | $ | 1.99
$2.17 - $2.36 |  | 233,687 |  |  | 4.00 |  | $ | 2.29 |  |  | 99,184 |  | $ | 2.29
$2.49 - $3.04 |  | 693,279 |  |  | 7.58 |  | $ | 3.01 |  |  | 655,947 |  | $ | 3.02
$3.15 - $3.45 |  | 106,542 |  |  | 6.75 |  | $ | 3.34 |  |  | 106,542 |  | $ | 3.34
$6.90 - $7.20 |  | 2,307 |  |  | 7.03 |  | $ | 5.42 |  |  | 2,307 |  | $ | 7.03
$10.00 - $11.70 |  | 4,190 |  |  | 4.75 |  | $ | 11.07 |  |  | 4,190 |  | $ | 11.07
$15.00 |  | 650 |  |  | 2.00 |  | $ | 15.05 |  |  | 650 |  | $ | 15.05
$1.03 - $15.00 |  | 1,624,188 |  |  | 7.25 |  | $ | 2.47 |  |  | 1,236,374 |  | $ | 2.65

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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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