Note 6 - Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Property and equipment, gross | $ 1,416 | $ 574 |
| Accumulated depreciation | (440) | (217) |
| Property and equipment, net | 976 | 357 |
| Production and Lab Equipment [Member] | ||
| Property and equipment, gross | 500 | 148 |
| Tooling [Member] | ||
| Property and equipment, gross | 273 | 81 |
| Computer Equipment [Member] | ||
| Property and equipment, gross | 467 | 180 |
| Furniture and Fixtures [Member] | ||
| Property and equipment, gross | $ 176 | $ 165 |