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Schedule of 2010 Non-Qualified Stock Option Plan (Details) - shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options outstanding, beginning of year | 3,611,850 | 4,303,900
Options granted | 474,750 | 649,850
Options outstanding, end of year | 3,516,225 | 3,611,850
2010 Non-Qualified Stock Option Plan [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options outstanding, beginning of year | 975,000 | 915,000
Options granted | 125,000 | 60,000
Options outstanding, end of year | 1,100,000 | 975,000

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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