Note 3 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

			Weighted Average
			Exercise Price
	Options		Per Option
Options outstanding, December 31, 2022		410,615	$	3.50
Granted to employees and non-employee directors		-		-
Exercised		109,250		3.20
Canceled/expired/forfeited		-		-
Options outstanding, March 31, 2023		301,365		3.61
Options exercisable, March 31, 2023		286,665		3.59