v3.26.1
Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 02, 2026
Dec. 31, 2025
Goodwill $ 271,383,000   $ 271,383,000     $ 167,450,000
Intangible Asset, Finite-Lived, Amortization Expense $ 1,195,000 $ 735,000 2,060,000 $ 1,469,000    
Middlefield Banc Corp [Member]            
Goodwill         $ 103,932,000  
Goodwill, Acquired During Period     $ 103,900,000