Note 7 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Intrinsic Value
Options outstanding at January 1, 2023		189,917		$	21.14
Options exercised		(15,500	)		18.83
Options outstanding at March 31, 2023		174,417		$	21.35		3.7	$	2,216,840
Options exercisable at March 31, 2023		144,567		$	21.29		3.5	$	1,846,121
Expected to vest after March 31, 2023		26,187		$	21.66		4.6	$	324,773

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Intrinsic Value
Options outstanding at March 31, 2023		117,200		31.00		9.1	$	358,632
Options exercisable at March 31, 2023		-		-		-		-
Expected to vest after March 31, 2023		102,820	$	31.00		9.1	$	314,628