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Note 17 - Segment Reporting - Financial Information by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Revenue from Contract with Customer, Including Assessed Tax | $ 4,610 | $ 3,662 | $ 7,734 | $ 6,935
Operating loss | $ (1,355) | $ (2,152) | $ (3,089) | $ (4,534)
Operating loss, percentage | 100.00% | 100.00% | 100.00% | 100.00%
Product [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 4,599 | $ 3,660 | $ 7,716 | $ 6,927
Total of Revenue | 100.00% | 100.00% | 100.00% | 100.00%
Optical and Wound Care [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 3,534 | $ 2,910 | $ 5,873 | $ 5,140
Operating loss | $ (1,062) | $ (1,308) | $ (2,396) | $ (3,347)
Operating loss, percentage | 78.00% | 61.00% | 78.00% | 74.00%
Optical and Wound Care [Member] | Product [Member] |  |  |  |
Total of Revenue | 77.00% | 79.00% | 76.00% | 74.00%
Skin Care [Member] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 1,076 | $ 752 | $ 1,861 | $ 1,795
Operating loss | $ (293) | $ (844) | $ (693) | $ (1,187)
Operating loss, percentage | 22.00% | 39.00% | 22.00% | 26.00%
Skin Care [Member] | Product [Member] |  |  |  |
Total of Revenue | 23.00% | 21.00% | 24.00% | 26.00%

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