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Note 8 - Stock-based Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2024 |  |  | 2023 |
Expected Volatility |  |  | 98 | % |  |  | 95 | %
Risk–free interest rate |  |  | 4.08 | % |  |  | 4.18 | %
Dividend yield |  |  | - | % |  |  | - | %
Expected life of options (in years) |  |  | 6.02 |  |  |  | 5.35 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |  |  |  |  |
|  | Options (#) |  |  | Exercise Price Per Share ($) |  |  | Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value ($) |
Outstanding at December 31, 2023 |  |  | 396,000 |  |  | $ | 15.70 |  |  |  |  |  |  | $ | - |
Granted |  |  | 20,000 |  |  |  | 1.29 |  |  |  |  |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  | - |
Canceled / forfeited |  |  | (50,000 | ) |  |  | 10.29 |  |  |  |  |  |  |  | 63,000 |
Outstanding at December 31, 2024 |  |  | 366,000 |  |  | $ | 15.66 |  |  |  | 8.05 |  |  | $ | - |
Vested and exercisable at December 31, 2024 |  |  | 220,000 |  |  | $ | 20.20 |  |  |  | 7.79 |  |  | $ | - |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | 2014 Plan Activity |  |  | Outside of the 2014 Plan Activity |  |  | Totals |
|  | Restricted Stock Units (#) |  |  | Weighted Average Grant Date Fair Value ($) |  |  | Restricted Stock Units (#) |  |  | Weighted Average Grant Date Fair Value ($) |  |  | Restricted Stock Units (#) |  |  | Weighted Average Grant Date Fair Value ($) |
At December 31, 2023 |  |  | 186,000 |  |  | $ | 10.87 |  |  |  | 90,000 |  |  | $ | 7.50 |  |  |  | 276,000 |  |  | $ | 9.76 |
Granted |  |  | 33,000 |  |  | $ | 0.81 |  |  |  | 625,000 |  |  |  | 0.84 |  |  |  | 658,000 |  |  |  | 0.85 |
Vested |  |  | (36,000 | ) |  | $ | 9.51 |  |  |  | (552,000 | ) |  |  | 1.13 |  |  |  | (588,000 | ) |  |  | 1.64 |
Canceled |  |  | (9,000 | ) |  | $ | 10.00 |  |  |  | (16,000 | ) |  |  | 18.56 |  |  |  | (25,000 | ) |  |  | 15.43 |
At December 31, 2024 |  |  | 174,000 |  |  | $ | 4.44 |  |  |  | 147,000 |  |  | $ | 3.92 |  |  |  | 321,000 |  |  | $ | 4.20 |
Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] |
|  |  |  |  |  | Weighted-Average |  |  |  |  |
|  | Warrants (#) |  |  | Exercise Price Per Share ($) |  |  | Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value ($) |
Outstanding at December 31, 2023 |  |  | 31,000 |  |  | $ | 49.21 |  |  |  | - |  |  | $ | - |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Expired |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at December 31, 2024 |  |  | 31,000 |  |  | $ | 49.21 |  |  |  | 2.70 |  |  | $ | - |
Vested and exercisable as of December 31, 2024 |  |  | 31,000 |  |  | $ | 49.21 |  |  |  | 3.70 |  |  | $ | - |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | 2024 |  |  | 2023 |
Stock options |  | $ | 411,000 |  |  | $ | 1,014,000 |
Warrants |  |  | - |  |  |  | 228,000 |
Restricted stock units |  |  | 878,000 |  |  |  | 1,493,000 |
Total noncash stock compensation expense |  | $ | 1,289,000 |  |  | $ | 2,735,000 |
|  | 2024 |  |  | 2023 |
Sales, marketing and advertising |  | $ | 488,000 |  |  | $ | 879,000 |
Engineering, technology and development |  |  | 30,000 |  |  |  | 219,000 |
General and administrative |  |  | 771,000 |  |  |  | 1,637,000 |
Total noncash stock compensation expense |  | $ | 1,289,000 |  |  | $ | 2,735,000 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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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