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Note 13 - Equity-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2024
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
(in thousands, except years and per share data) |  | Awards* |  |  | Weighted- Average Exercise Price* |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2023 |  |  | 4 |  |  | $ | 1,145.87 |  |  |  | 7.3 |  |  | $ | 1 |
Restricted stock units granted |  |  | 5 |  |  | $ | — |  |  |  |  |  |  |  |  |
Options forfeited/cancelled |  |  | (2 | ) |  | $ | 535.07 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2024 |  |  | 7 |  |  | $ | 470.76 |  |  |  | 8.5 |  |  | $ | 4 |
Vested and expected to vest at September 30, 2024 |  |  | 7 |  |  | $ | 474.75 |  |  |  | 8.5 |  |  | $ | 4 |
Vested and exercisable at September 30, 2024 |  |  | 1 |  |  | $ | 2,122.83 |  |  |  | 4.7 |  |  | $ | — |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Research and development |  | $ | 3 |  |  | $ | 5 |  |  | $ | 12 |  |  | $ | 16 |
Sales and marketing |  |  | 8 |  |  |  | 18 |  |  |  | 48 |  |  |  | 49 |
General and administrative |  |  | 11 |  |  |  | 39 |  |  |  | 77 |  |  |  | 136 |
Total stock-based compensation expense |  | $ | 22 |  |  | $ | 62 |  |  | $ | 137 |  |  | $ | 201 |
Employees and Directors [Member] |
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Assumption |  | For the Nine Months Ended September 30, 2023 |
Expected price volatility |  |  | 152.99 | %
Expected term (in years) |  |  | 6.81 |
Risk-free interest rate |  |  | 3.47 | %
Dividend yield |  |  | 0.00 | %
Weighted-average fair value of options granted during the period |  | $ | 58.57 |

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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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