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Note 9 - Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Foreign Currency Translation Adjustments |  |  | Unrealized Gains (Losses) on Available-For-Sale Investments |  |  | Total |
Balance, December 31, 2022 |  | $ | (988 | ) |  | $ | (16 | ) |  | $ | (1,004 | )
Other comprehensive loss |  |  | (97 | ) |  |  | (3 | ) |  |  | (100 | )
Balance, March 31, 2023 |  |  | (1,085 | ) |  |  | (19 | ) |  |  | (1,104 | )
Other comprehensive income (loss) |  |  | (152 | ) |  |  | 11 |  |  |  | (141 | )
Balance, June 30, 2023 |  |  | (1,237 | ) |  |  | (8 | ) |  |  | (1,245 | )
Other comprehensive income (loss) |  |  | (23 | ) |  |  | 1 |  |  |  | (22 | )
Balance, September 30, 2023 |  | $ | (1,260 | ) |  | $ | (7 | ) |  | $ | (1,267 | )

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