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Note 5 - Fair Value Measurements - Fair Value Reconciliation of Level 3 Assets (Details) - Subordinated Debt Obligations [Member] - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Beginning of year $ 6,639 $ 8,801
Transfers out of Level III (1) [1] 0 (2,250)
Net change in unrealized loss on investment securities available-for-sale 20 88
End of year $ 6,659 $ 6,639
[1] Transfers between hierarchy levels are based on the availability of sufficient observable inputs to meet Level II versus Level III criteria. The level designation of each financial instrument is reassessed at the end of each period.