Note 10 - Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Shares			Weighted- Average Exercise Price Per Share			Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding – January 1, 2020		372,200		$	3.85
Granted		42,300			4.34
Exercised		(14,133	)		(3.78	)
Cancelled		(37,727	)		(3.37	)
Outstanding – December 31, 2020		362,640		$	3.96			7.78	$	1,164
Granted		49,000			8.50
Exercised		(13,400	)		3.43
Cancelled		(10,740	)		3.42
Outstanding – December 31, 2021		387,500		$	4.57			7.17	$	2,250
Exercisable on December 31, 2021		186,700		$	3.79			6.31	$	1,225