Note 3 - Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Stock-based compensation related to:
Stock option grants	$	77	$	126	$	221	$	250
Stock unit awards		92		34		165		73
Total stock-based compensation	$	169	$	160	$	386	$	323

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

						Weighted Average
				Weighted 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		-						$	-
Forfeited		( 29	)	$	3.47
Outstanding, June 30, 2021		575		$	14.23		6.6	$	98
Exercisable, June 30, 2021		464		$	15.12		6.2	$	-

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

	Number of Shares			Weighted Average Price per Share (2)		Weighted Average Fair Value (2)
Outstanding & Unvested, December 31, 2020		166		$	4.50	$	747
Granted		119		$	6.55	$	779
Converted to common stock		(4	)	$	10.60	$	(42	)
Cancelled		-			-	$	-
Forfeited		-			-	$	-
Outstanding & Unvested, June 30, 2021		281		$	5.28	$	1,484