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Note 7 - Fair Value - Changes in Level 3 Assets Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Balance at the beginning of the period $ 4,585 $ 2,006 $ 3,585 $ 2,006
Included in earnings 0 0 0 0
Included in other comprehensive income 0 0 0 0
Purchased into Level 3 0 0 1,000 0
Transfers in and/or out of Level 3 0 0 0 0
Balance at the end of the period $ 4,585 $ 2,006 $ 4,585 $ 2,006