v3.26.3
Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 02, 2026
Dec. 31, 2025
Goodwill $ 270,507,000   $ 270,507,000     $ 167,450,000
Intangible Asset, Finite-Lived, Amortization Expense $ 1,214,000 $ 718,000 3,274,000 $ 2,188,000    
Middlefield Banc Corp [Member]            
Goodwill         $ 103,056,000  
Goodwill, Acquired During Period     $ 103,100,000