Note 5 - Stockholders' Equity and Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	2021					2020
				Weighted					Weighted
				Average					Average
	Number of			Exercise		Number of			Exercise
	Options			Price		Shares			Price
Outstanding at beginning of year		9,000		$	13.30		33,250		$	9.64
Granted		—			—		—			—
Exercised		(3,654	)		13.30		(24,250	)		8.28
Expired/Forfeited		(5,346	)		13.30		—			—
Outstanding at end of year		—		$	—		9,000		$	13.30
Options exercisable at end of year		—		$	—		9,000		$	13.30

Schedule of Nonvested Share Activity [Table Text Block]

				Weighted
				Average
	Deferred			Fair Value
	Stock			Per Share
Non-Vested Balance, December 31, 2020		20,073		$	11.17
Granted		10,710			14.00
Vested		(20,073	)		11.17
Forfeited		—			—
Non-Vested Balance, December 31, 2021		10,710		$	14.00

				Weighted
				Average
	Deferred			Fair Value
	Stock			Per Share
Non-Vested Balance, December 31, 2020		18,800		$	11.07
Granted		27,900			13.33
Vested		—			—
Forfeited		(3,300	)		11.69
Non-Vested Balance, December 31, 2021		43,400		$	12.48