Note 8 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

	Number of Stock Options			Weighted-Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding as of December 31, 2021		23,766		$	9.94
Granted		-			-
Exercised		(15,086	)		8.21
Forfeited/cancelled/expired		-			-
Outstanding as of September 30, 2022		8,680			12.95		0.54	$	87,691
Exercisable as of September 30, 2022		8,680		$	12.95		-	$	-

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Nonvested Shares			Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2021		82,693		$	21.78
Granted		53,543			30.76
Vested		(42,815	)		25.00
Forfeited/cancelled/expired		(374	)		30.99
Nonvested as of September 30, 2022		93,047		$	25.43

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

	Units (expected)			Units (maximum)		Weighted Average Grant Date Fair Value
Unearned as of December 31, 2021		209,995				$	16.18
Awarded		34,874					32.80
Vested shares		(49,604	)				20.79
Unearned as of September 30, 2022		195,265			221,541	$	17.98

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Units (expected)			Weighted Average Grant Date Fair Value
Unearned as of December 31, 2021		136,948		$	16.52
Awarded		52,312			32.80
Vested shares		(69,225	)		16.13
Unearned as of September 30, 2022		120,035		$	23.84