Note 3 - Investment in Westamerica Bancorporation Common Stock (Tables)

12 Months Ended

Dec. 31, 2025

EBP 94-2156203 002 [Member]

Notes Tables

EBP, Investments in Employer Securities [Table Text Block]

		2025				2024

Number of shares			282,987				289,057

Cost		$	13,113,933			$	13,364,031

Fair value		$	13,535,278			$	15,163,919