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Note 17 - Segment Reporting - Financial Information by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Revenue from Contract with Customer, Including Assessed Tax | $ 3,265 | $ 3,826 | $ 10,999 | $ 10,761
Operating loss | $ (1,116) | $ (457) | $ (4,205) | $ (4,991)
Operating loss, percentage | 100.00% | 100.00% | 100.00% | 100.00%
Product [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 3,255 | $ 3,816 | $ 10,971 | $ 10,743
Total of Revenue | 100.00% | 100.00% | 100.00% | 100.00%
Optical and Wound Care [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 2,481 | $ 2,507 | $ 8,354 | $ 7,646
Operating loss | $ (698) | $ (257) | $ (3,094) | $ (3,605)
Operating loss, percentage | 63.00% | 56.00% | 74.00% | 72.00%
Optical and Wound Care [Member] | Product [Member] |  |  |  |
Total of Revenue | 76.00% | 66.00% | 76.00% | 71.00%
Skin Care [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 784 | $ 1,319 | $ 2,645 | $ 3,115
Operating loss | $ (418) | $ (200) | $ (1,111) | $ (1,386)
Operating loss, percentage | 37.00% | 44.00% | 26.00% | 28.00%
Skin Care [Member] | Product [Member] |  |  |  |
Total of Revenue | 24.00% | 34.00% | 24.00% | 29.00%

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