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Schedule of Non-qualified Stock Options (Details) - Non Qualified Stock Option [Member] - $ / shares | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Offsetting Assets [Line Items] |  |
Number of stock options, options outstanding, beginning of year | 112,500 | 164,167
Weighted exercise price option outstanding, beginning of year | $ 3.51 | $ 3.13
Number of stock options, granted |  |
Weighted exercise price, granted |  |
Number of stock options, redeemed | (17,500) | (17,500)
Weighted exercise price redeemed | $ 2.55 | $ 1.21
Number of stock options, exercised | (5,000) | (5,000)
Weighted exercise price exercised | $ 2.55 | $ 1.21
Number of stock options, expired / terminated |  |
Weighted exercise price expired / terminated |  |
Number of stock options options outstanding end of period | 90,000 | 141,667
Weighted exercise price, option outstanding end of period | $ 3.76 | $ 3.43
Number of stock options options exercisable end of period | 90,000 | 141,667
Weighted exercise price, options exercisable, end of period | $ 3.76 | $ 3.43

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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