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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
Mar. 31, 2021
Mar. 31, 2020
Balance at the beginning of the period $ 2,006 $ 4,022
Included in earnings
Included in other comprehensive income
Purchased into Level 3
Transfers in and/or out of Level 3
Balance at the end of the period $ 2,006 $ 4,022