Note 3 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2022		2021		2022		2021
Stock-based compensation related to:
Stock option grants	$	20	$	53	$	114	$	275
Stock unit awards		257		125		580		289
Total stock-based compensation	$	277	$	178	$	694	$	564

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

				Weighted		Weighted Average
				Average		Remaining		Aggregate
	Number of			Exercise Price		Contractual Life		Intrinsic
	Shares			Per Share		(years)		Value(1)
Outstanding, December 31, 2021		574		$	14.23		6.1	$	100
Granted		-		$	-
Exercised		(1	)	$	4.07
Forfeited		(1	)	$	4.07
Outstanding, September 30, 2022		572		$	14.28		5.3	$	74
Exercisable, September 30, 2022		519		$	14.89		5.1	$	21

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

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share
Outstanding & Unvested, December 31, 2022		224		$	5.48
Granted		146		$	6.53
Converted to common stock		(55	)	$	6.43
Cancelled		(6	)	$	6.43
Forfeited		(31	)	$	6.19
Outstanding & Unvested, September 30, 2022		278		$	5.79