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Note 13 - Options (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] |
Shares Underlying Options Outstanding |  |  | Shares Underlying Options Exercisable |
Range of Exercise Prices |  | Shares Underlying Options Outstanding |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price |  |  | Shares Underlying Options Exercisable |  |  | Weighted Average Exercise Price |
$2.35 | - | $195.00 |  |  | 590,991 |  | 8.1 |  | $ | 4.53 |  |  |  | 160,199 |  |  | $ | 5.02 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number |  |  | Exercise |
|  | of Shares |  |  | Prices |
Balance, December 31, 2020 |  |  | 459,524 |  |  | $ | 8.70 |
Options granted |  |  | 257,975 |  |  |  | 4.36 |
Options cancelled |  |  | (176,312 | ) |  |  | (12.66 | )
Balance, December 31, 2021 |  |  | 541,187 |  |  |  | 6.77 |
Options granted |  |  | 137,597 |  |  |  | 2.99 |
Options cancelled |  |  | (87,793 | ) |  |  | (7.11 | )
Balance, December 31, 2022 |  |  | 590,991 |  |  | $ | 4.53 |
Exercisable, December 31, 2022 |  |  | 160,199 |  |  | $ | 5.02 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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