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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
Balance as of December 31, 2021 |  | $ | 620 |
Amounts accrued |  |  | 398 |
Write-offs charged against the allowance |  |  | (34 | )
Balance as of December 31, 2022 |  | $ | 984 |
Amounts accrued |  |  | 153 |
Write-offs charged against the allowance |  |  | (436 | )
Balance as of December 31, 2023 |  | $ | 701 |
Schedule of Inventory, Current [Table Text Block] |
|  | December 31, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Raw materials |  | $ | 2,063 |  |  | $ | 1,671 |
Work-in-process |  |  | 504 |  |  |  | 596 |
Total inventories |  | $ | 2,567 |  |  | $ | 2,267 |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, |
|  | 2023 |  |  | 2022 |
Equipment |  | $ | 334 |  |  | $ | 138 |
Leasehold improvements |  |  | 298 |  |  |  | 197 |
Furniture and fixtures |  |  | 205 |  |  |  | 199 |
Other depreciable assets |  |  | 135 |  |  |  | 124 |
Total property and equipment |  |  | 972 |  |  |  | 658 |
Less: accumulated depreciation and amortization |  |  | (473 | ) |  |  | (457 | )
Net property and equipment |  | $ | 499 |  |  | $ | 201 |
Schedule of Estimated Useful Lives [Table Text Block] |
Asset class |  |  | Useful life assigned (in years) |
Equipment |  |  | 3 – 5 |
Furniture and fixtures |  |  | 3 – 5 |
Leasehold improvements |  |  | Shorter of 5 years or term of lease |

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