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Note 13 - Other Financial Statement Information (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | June 30, 2025 |  | December 31, 2024
Raw materials |  | $ | 331 |  |  | $ | 302 |
Work in process |  |  | 7 |  |  |  | 5 |
Finished goods |  |  | — |  |  |  | 31 |
Total gross inventory |  |  | 338 |  |  |  | 338 |
Reserve for excess and obsolete inventory |  |  | (84 | ) |  |  | (71 | )
Inventories, net |  | $ | 254 |  |  | $ | 267 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | June 30, 2025 |  | December 31, 2024
Intellectual property |  | $ | 214 |  |  | $ | 214 |
Gross intangible assets |  |  | 214 |  |  |  | 214 |
Less: Accumulated amortization |  |  | (189 | ) |  |  | (178 | )
Intangible assets, net |  | $ | 25 |  |  | $ | 36 |

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