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Shareholders' Equity and Capital Stock (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Outstanding Beginning Balance, Options | 8,511,722 | 6,413,902 | 5,665,568 |
| Granted, Options | 1,876,670 | 3,114,207 | 3,162,098 |
| Exercised, Options | (377,927) | (88,473) | (1,677,432) |
| Forfeited, Options | (31,806) | (145,414) | (241,332) |
| Expired, Options | (705,000) | (782,500) | (495,000) |
| Outstanding Ending Balance, Options | 9,273,659 | 8,511,722 | 6,413,902 |
| Outstanding Beginning Balance, Weighted-average exercise price | $ 1.32 | $ 1.75 | $ 1.79 |
| Granted, Weighted-average exercise price | $ 1.07 | $ 0.87 | $ 2.07 |
| Exercised, Weighted-average exercise price | $ 0.79 | $ 0.85 | $ 2.02 |
| Forfeited, Weighted-average exercise price | $ 0.78 | $ 1.99 | $ 2.14 |
| Expired, Weighted-average exercise price | $ 1.69 | $ 3.25 | $ 2.59 |
| Outstanding Ending Balance, Weighted-average exercise price | $ 1.19 | $ 1.32 | $ 1.75 |
| X | ||||||||||
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- Definition
Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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| X | ||||||||||
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- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. No definition available.
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| X | ||||||||||
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- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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| X | ||||||||||
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- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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