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Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2020 | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | May 31, 2018 USD ($)
Accounts Receivable, Allowance for Credit Loss, Recovery |  | $ 0 | $ 198 |
Accounts Receivable, Credit Loss Expense (Reversal) |  | $ 27 | 0 |
Number of Operating Segments |  | 3 |  |
Inventory Write-down |  | $ 703 | 544 |
Depreciation, Total |  | 1,399 | 1,022 |
Deferred Grant Proceeds |  | 368 |  |
Foreign Currency Transaction Gain (Loss), before Tax, Total |  | $ (203) | $ 9 |
Restricted Stock [Member] | Vesting Based On Performance Metrics [Member] | Restricted Stock Vesting in Three Years [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 100.00% |  |  |
Restricted Stock [Member] | Employees [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 4 years |  |
Restricted Stock [Member] | Independent Directors [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period |  | 1 year |  |
Restricted Stock [Member] | Independent Directors [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  | 25.00% |  |
City of Rochester and State of New York [Member] |  |  |  |
Contingent Liability, Repayment of State and Local Grant Funds Received |  |  |  | $ 550
Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 1 year |  |
Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 10 years |  |

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