Note 3 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Stock-based compensation related to:
Stock option grants	$	53	$	102	$	275	$	353
Stock unit awards		125		24		289		96
Total stock-based compensation	$	178	$	126	$	564	$	449

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, 2020		604		$	14.31		7.0	$	-
Granted		-		$	-
Exercised		-		$	-
Cancelled		-		$	-
Forfeited		( 29	)	$	3.47
Outstanding, September 30, 2021		575		$	14.23		6.3	$	147
Exercisable, September 30, 2021		464		$	15.12		6.0	$	-

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, 2020		166		$	4.50
Granted		119		$	6.55
Converted to common stock		(6	)	$	11.55
Cancelled		(1	)	$	13.36
Forfeited		-			-
Outstanding & Unvested, September 30, 2021		278		$	5.28