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Note 10 - Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |  |  |  |  |
|  | Options on Common Shares |  |  | Exercise Price |  |  | Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding January 1, 2023 |  |  | 5,491,399 |  |  | $ | 3.72 |  |  |  | 5.96 |  |  | $ | 92 |
Granted |  |  | 60,000 |  |  | $ | 1.34 |  |  |  |  |  |  |  |  |
Exercised |  |  | (250 | ) |  | $ | 1.50 |  |  |  |  |  |  |  |  |
Forfeited, cancelled, expired |  |  | (3,329,476 | ) |  | $ | 5.54 |  |  |  |  |  |  |  |  |
Outstanding September 30, 2023 |  |  | 2,221,673 |  |  | $ | 3.56 |  |  |  | 7.65 |  |  | $ | 10 |
Exercisable September 30, 2023 |  |  | 1,033,504 |  |  | $ | 4.37 |  |  |  | 7.02 |  |  | $ | - |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | For the Nine Months |
|  | Ended September 30, |
|  | 2023 |  |  | 2022 |
Expected stock price volatility |  |  | 49 | % |  |  | 49 | %
Risk-free interest rate |  |  | 3.64 | % |  |  | 1.17 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | %
Expected life of options |  |  | 6.66 |  |  |  | 3.46 |
Weighted-average fair value of options granted |  | $ | 0.55 |  |  | $ | 1.25 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Service-Based RSU's |  |  | Weighted Average Grant Date Fair Value |  |  | Weighted Average Vesting Period (Years) |
Unvested at January 1, 2023 |  |  | 922,057 |  |  | $ | 2.88 |  |  |  | 2.11 |
Granted - service based |  |  | 686,394 |  |  | $ | 1.33 |  |  |  |  |
Vested |  |  | (862,993 | ) |  | $ | 2.87 |  |  |  |  |
Forfeited and cancelled |  |  | (298,381 | ) |  | $ | 2.47 |  |  |  |  |
Unvested at September 30, 2023 |  |  | 447,077 |  |  | $ | 2.00 |  |  |  | 1.74 |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Selling, general and administrative |  | $ | (149 | ) |  | $ | 700 |  |  | $ | 1,404 |  |  | $ | 2,180 |
Research and development |  |  | (53 | ) |  |  | 172 |  |  |  | 244 |  |  |  | 448 |
Total share-based expense |  | $ | (202 | ) |  | $ | 872 |  |  | $ | 1,648 |  |  | $ | 2,628 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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