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Note 9 - Stockholders' Equity - Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023
Balance | $ 45,425 | $ 48,050 | $ 50,151
Balance | 43,310 | 45,425 | 48,050
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |
Balance | (1,237) | (1,085) | (988)
Other comprehensive income (loss) | (23) | (152) | (97)
Balance | (1,260) | (1,237) | (1,085)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |
Balance | (8) | (19) | (16)
Other comprehensive income (loss) | 1 | 11 | (3)
Balance | (7) | (8) | (19)
AOCI Attributable to Parent [Member] |  |  |
Balance | (1,245) | (1,104) | (1,004)
Other comprehensive income (loss) | (22) | (141) | (100)
Balance | $ (1,267) | $ (1,245) | $ (1,104)

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