Note 6 - Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2022			2021
Expected dividend yield at date of grant		3.39	%		2.15	%
Expected stock price volatility		35.52	%		34.85	%
Risk-free interest rate		2.33	%		0.91	%
Expected life of options (in years)		6.0			7.0

Share-Based Payment Arrangement, Activity [Table Text Block]

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Terms (Years)		Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021		477,640	$	30.88		5.97	$	6,337
Granted		127,227	$	36.67
Exercised		-	$	-			$	-
Forfeited		-	$	-				-
Outstanding at June 30, 2022		604,867	$	32.10		5.96	$	5,672
Exercisable at June 30, 2022		346,721	$	26.03		4.21	$	5,195

Schedule of Nonvested Share Activity [Table Text Block]

	Common Shares Outstanding		Weighted Average Grant Date Fair Value Per Share
Outstanding at December 31, 2021		12,698	$	42.92
Granted		-		-
Vested		-		-
Forfeited		-		-
Outstanding at June 30, 2022		12,698	$	42.92