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Note 2 - Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
Balance as of December 31, 2022 |  | $ | 984 |
Amounts accrued |  |  | 318 |
Write-offs charged against the allowance |  |  | (228 | )
Balance as of September 30, 2023 |  | $ | 1,074 |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Raw materials, net of reserve |  | $ | 1,745 |  |  | $ | 1,671 |
Work-in-process |  |  | 561 |  |  |  | 596 |
Total inventories |  | $ | 2,306 |  |  | $ | 2,267 |

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