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Note 3 - Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Available-for-sale debt securities |  |  | Cash flow hedges |  |  | Total |
|  | (in thousands) |
Balances at December 31, 2018 |  | $ | (545 | ) |  | $ | (41 | ) |  | $ | (586 | )
Change in unrealized gains during the period |  |  | 1,610 |  |  |  | 651 |  |  |  | 2,261 |
Net gains reclassified into income during the period |  |  | — |  |  |  | (169 | ) |  |  | (169 | )
Income tax provision |  |  | (243 | ) |  |  | (101 | ) |  |  | (344 | )
Net change during the period |  |  | 1,367 |  |  |  | 381 |  |  |  | 1,748 |
Balances at December 31, 2019 |  |  | 822 |  |  |  | 340 |  |  |  | 1,162 |
Change in unrealized gains (losses) during the period |  |  | 549 |  |  |  | (2,099 | ) |  |  | (1,550 | )
Net gains reclassified into income during the period |  |  | (25 | ) |  |  | (564 | ) |  |  | (589 | )
Income tax benefit (provision) |  |  | (122 | ) |  |  | 615 |  |  |  | 493 |
Net change during the period |  |  | 402 |  |  |  | (2,048 | ) |  |  | (1,646 | )
Balances at December 31, 2020 |  |  | 1,224 |  |  |  | (1,708 | ) |  |  | (484 | )
Change in unrealized gains (losses) during the period |  |  | (1,854 | ) |  |  | 2,837 |  |  |  | 983 |
Net losses reclassified into income during the period |  |  | 22 |  |  |  | 933 |  |  |  | 955 |
Income tax benefit (provision) |  |  | 423 |  |  |  | (870 | ) |  |  | (447 | )
Net change during the period |  |  | (1,409 | ) |  |  | 2,900 |  |  |  | 1,491 |
Balances at December 31, 2021 |  | $ | (185 | ) |  | $ | 1,192 |  |  | $ | 1,007 |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | (in thousands) |
Reclassification of AOCI - Available-for-sale debt securities |  |  |  |  |  |  |  |  |  |  |  |
Other income (expense), net |  | $ | (22 | ) |  | $ | 25 |  |  | $ | — |
Reclassification of AOCI - Cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | (1,667 | ) |  | $ | 960 |  |  | $ | 169 |
Cost of revenues |  |  | 149 |  |  |  | (76 | ) |  |  | — |
Research and development |  |  | 492 |  |  |  | (264 | ) |  |  | — |
Sales and marketing |  |  | 28 |  |  |  | (20 | ) |  |  | — |
General and administrative |  |  | 65 |  |  |  | (36 | ) |  |  | — |
Total |  | $ | (933 | ) |  | $ | 564 |  |  | $ | 169 |

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