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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, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Net sales | $ 11,716 | $ 14,276 | $ 36,622 | $ 43,897
Income (loss) from operations | (145) | 479 | (313) | 1,084
Other income (expense), net | 187 | (53) | 472 | (92)
Income before income taxes | 42 | 426 | 159 | 992
Operating Segments [Member] |  |  |  |
Income (loss) from operations | 1,860 | 2,568 | 5,906 | 7,753
Intersegment Eliminations [Member] |  |  |  |
Income (loss) from operations | (2,005) | (2,089) | (6,219) | (6,669)
CHINA |  |  |  |
Net sales | 346 | 501 | 1,313 | 1,596
CHINA | Operating Segments [Member] |  |  |  |
Income (loss) from operations | (71) | 5 | (86) | 51
Russia and Kazakhstan [Member] |  |  |  |
Net sales | 129 | 199 | 421 | 622
Russia and Kazakhstan [Member] | Operating Segments [Member] |  |  |  |
Income (loss) from operations | (36) | 5 | (132) | (101)
Primary Reporting Segment [Member] |  |  |  |
Net sales | 11,241 | 13,576 | 34,888 | 41,679
Primary Reporting Segment [Member] | Operating Segments [Member] |  |  |  |
Income (loss) from operations | $ 1,967 | $ 2,558 | $ 6,124 | $ 7,803

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