Schedule of stock option plan (Details) - Stock Option Plan 2015 [Member] - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
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| Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] | ||
| Outstanding at beginning | 3,672,500 | 2,922,494 |
| Outstanding at beginning | $ 3.42 | $ 2.46 |
| Granted | 135,000 | 1,250,000 |
| Granted | $ 3.07 | $ 3.94 |
| Exercised | 75,000 | 1,000,000 |
| Exercised | $ 1.60 | $ 1.23 |
| Forfeited | 93,750 | 0 |
| Forfeited | $ 1.57 | $ 0 |
| Outstanding at ending | 3,638,750 | 3,172,494 |
| Outstanding at ending | $ 3.49 | $ 3.43 |
| Options exercisable at March 31 | 1,358,750 | 803,119 |
| Options exercisable at March 31 | $ 2.83 | $ 2.09 |
| Weighted average fair value of options granted during the period | $ 2.45 | $ 3.06 |
| stock-based compensation expense | $ 524,670 | $ 1,086,681 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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/disclosureRef
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- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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/disclosureRef
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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/disclosureRef
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- Details
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