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Shareholders Equity and Capital Stock (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Shareholders' Equity and Capital Stock |  |  |
Outstanding, Beginning Balance | 11,076,583 | 9,731,612 | 9,459,401
Granted, Options | 2,950,180 | 2,852,386 | 2,182,955
Exercised, options | (159,982) | (323,618) | (496,838)
Forfeited, Options | (534,425) | (395,851) | (275,085)
Expired, Options | (1,421,932) | (787,946) | (1,138,821)
Outstanding Ending Balance, Options | 11,910,424 | 11,076,583 | 9,731,612
Outstanding, Beginning Balance, Weighted-average exercise price | $ 0.64 | $ 0.64 | $ 0.70
Granted, Weighted-average exercise price | 0.48 | 0.61 | 0.70
Exercised, Weighted-average exercise price | 0.63 | 0.63 | 0.58
Forfeited, Weighted-average exercise price | 0.64 | 0.71 | 0.72
Expired, Weighted-average exercise price | 0.66 | 0.83 | 0.83
Outstanding Ending Balance, Weighted-average exercise price | $ 0.61 | $ 0.64 | $ 0.64

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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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. + References No definition available. + Details
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