Note 10 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	2022						2021
	Minimum			Maximum			Minimum			Maximum
Dividend Yield		4.07	%		4.82	%		3.64	%		4.37	%
Risk-free interest rate		1.80	%		3.92	%		0.41	%		1.27	%
Expected volatility		23.14	%		23.97	%		22.83	%		23.84	%
Weighted average expected life		5.5			5.6			5.1			5.7
Weighted average per share value of options		2.48			2.84			1.92			2.97

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

						Weighted Average		Aggregate
				Weighted Average		Years Remaining in		Intrinsic Value
Stock Options	Shares			Exercise Price		Contractual Term		(000's)
Outstanding December 31, 2019		1,025,771		$	13.29		5.56	$	5,887
Options exercisable at December 31, 2019		546,770			12.93		5.31	$	3,335
Granted		35,000			16.06			$	97
Exercised		(291,944	)		12.66				1,799
Forfeited		(17,000	)		17.17				28
Outstanding December 31, 2020		751,827			13.57		4.82	$	3,945
Options exercisable at December 31, 2020		433,827			13.31		4.45	$	2,392
Granted		45,000			20.44			$	39
Exercised		(179,517	)		12.85				1,496
Forfeited		(23,000	)		16.50				108
Outstanding December 31, 2021		594,310			14.20		4.33	$	4,158
Options exercisable at December 31, 2021		352,310			13.70		3.78	$	2,636
Granted		35,000			18.38			$	2
Exercised		(44,690	)		12.62				198
Forfeited		(29,001	)		18.82				1
Outstanding December 31, 2022		555,619			14.35		3.41	$	1,708
Options exercisable at December 31, 2022		409,119			13.76		2.59	$	1,408

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

	Options Outstanding		Weighted Average Exercise Price		Remaining Life (Years)		Options Exercisable		Weighted Average Exercise Price		Remaining Life (Years)
Range of Exercise Prices:
$0.01 - $10.00		-	$	-		-		-	$	-		-
$10.01 - $15.00		409,619	$	12.88		2.14		338,119	$	12.88		2.00
$15.01 - $20.00		120,000	$	17.93		6.63		65,000	$	17.65		5.21
Over $20.01		26,000	$	20.97		8.39		6,000	$	20.88		7.29
Total		555,619	$	14.35		3.41		409,119	$	13.76		2.59

Schedule of Nonvested Share Activity [Table Text Block]

				Weighted Average
Stock Options	Shares			Grant Date Fair Value
Nonvested at December 31, 2020		318,000		$	3.16
Granted		45,000			2.48
Vested		(103,000	)		3.26
Forfeited		(18,000	)		2.23
Nonvested at December 31, 2021		242,000			3.06
Nonvested at December 31, 2021		242,000			3.06
Granted		35,000			2.63
Vested		(113,500	)		2.66
Forfeited		(17,000	)		2.52
Nonvested at December 31, 2022		146,500			2.90

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

				Weighted Average
Restricted Stock	Shares			Grant Date Fair Value
Nonvested at December 31, 2020		46,000		$	12.75
Granted		28,722			20.09
Vested		(23,000	)		12.75
Forfeited		-			-
Nonvested at December 31, 2021		51,722			16.82
Nonvested at December 31, 2021		51,722			16.82
Granted		17,665			19.43
Vested		(24,288	)		13.12
Forfeited		-			-
Nonvested at December 31, 2022		45,099			19.84