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Schedule of Other Stock Options Issued (Details) - shares | Dec. 31, 2018 | Dec. 31, 2017
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Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options outstanding, beginning of year | 5,040,450 | 5,169,200
Options outstanding, end of year | 4,303,900 | 5,040,450
Other Options Issued [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options outstanding, beginning of year | 625,000 | 625,000
Options outstanding, end of year | 625,000 | 625,000

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + 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=109197908&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=109197908&loc=d3e5070-113901 + Details
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