Note 3 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

	Three Months Ended
	March 31,
	2022		2021
Share-based compensation related to:
Stock option grants	$	53	$	145
Restricted Stock Unit awards		126		72
Total share-based compensation	$	179	$	217

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, 2021		574	$	14.23		6.1	$	100
Granted		-	$	-
Exercised		-	$	-
Forfeited		-	$	-
Outstanding, March 31, 2022		574	$	14.23		5.8	$	93
Exercisable, March 31, 2022		473	$	14.90		5.5	$	28

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, 2021		224		$	5.48
Granted		-		$	-
Converted to common stock		(1	)	$	6.63
Cancelled		-			-
Forfeited		(9	)	$	5.76
Outstanding & Unvested, March 31, 2022		214		$	5.47