Note 8 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Stock options and restricted stock units, net of forfeitures	$	101	$	90	$	288	$	136
After-tax effect of stock-based compensation	$	101	$	90	$	288	$	136

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

						Weighted- Average
	Number			Weighted-		Remaining		Aggregate
	of			Average		Contractual		Intrinsic
	Options			Exercise Price		Term		Value
Outstanding on January 1, 2023		384,500		$	2.98
Granted		—			—
Exercised		(44,000	)		0.96
Expired or forfeited		(70,000	)		3.85
Outstanding on September 30, 2023		270,500		$	3.09		1.81	$	9
Exercisable on September 30, 2023		270,500		$	3.09		1.81	$	9

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

				Weighted Average
				Grant Date
	Shares			Fair Value
Unvested restricted stock units at January 1, 2023		767,048		$	1.32
Granted		965,200			1.26
Vested		(45,000	)		1.37
Unvested restricted stock units at September 30, 2023		1,687,248		$	1.29