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Note 20 - Segment Reporting - Financial Information by Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Revenue from Contract with Customer, Including Assessed Tax | $ 14,726 | $ 14,404
Total sales, percentage | 100.00% | 100.00%
Operating loss | $ 7,596 | $ 14,417
Operating loss, percentage | 100.00% | 100.00%
Product [Member] |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 14,687 | $ 14,374
Optical and Wound Care [Member] |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 11,174 | $ 10,239
Total sales, percentage | 76.00% | 71.00%
Operating loss | $ 3,650 | $ 5,645
Operating loss, percentage | 48.00% | 39.00%
Skin Care [Member] |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 3,552 | $ 4,165
Operating loss | $ 3,946 | $ 8,772
Skin Care [Member] | Product [Member] |  |
Total sales, percentage | 24.00% | 29.00%
Operating loss, percentage | 52.00% | 61.00%

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