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Note 11 - Segment Information - Operating Information by Geographic Area (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Net sales | $ 10,615 | $ 11,716 | $ 32,987 | $ 36,622
Loss from operations | (292) | (145) | (1,429) | (313)
Other income, net | 585 | 187 | 1,708 | 472
Income before income taxes | 293 | 42 | 279 | 159
Operating Segments [Member] |  |  |  |
Loss from operations | 1,673 | 1,860 | 4,654 | 5,906
Intersegment Eliminations [Member] |  |  |  |
Loss from operations | (1,965) | (2,005) | (6,083) | (6,219)
CHINA |  |  |  |
Net sales | 254 | 346 | 917 | 1,313
CHINA | Operating Segments [Member] |  |  |  |
Loss from operations | (160) | (71) | (423) | (86)
Russia and Kazakhstan [Member] |  |  |  |
Net sales | 112 | 129 | 351 | 421
Russia and Kazakhstan [Member] | Operating Segments [Member] |  |  |  |
Loss from operations | (47) | (36) | (131) | (132)
Primary Reporting Segment [Member] |  |  |  |
Net sales | 10,249 | 11,241 | 31,719 | 34,888
Primary Reporting Segment [Member] | Operating Segments [Member] |  |  |  |
Loss from operations | $ 1,880 | $ 1,967 | $ 5,208 | $ 6,124

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