Note 7 - Stock-based Awards (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

Grant Date	Type		Shares		Fair Value Per Share (1)
July 24, 2018		Options		2	$	5.49
May 3, 2018		SUA		6	$	21.04
May 3, 2018		Options		117	$	5.69
May 4, 2017		Options		121	$	4.46
May 4, 2017		SUA		13	$	18.87
May 12, 2016		Options		121	$	2.34
May 12, 2016		SUA		17	$	13.82

Share-based Compensation, Stock Options, Activity [Table Text Block]

			Weighted Ave.		Aggregate
	Number of		Exercise Price		Intrinsic
	Shares		per Share		Value (2)
Outstanding, December 31, 2017		279	$	15.40	$	1,436
Granted		119	$	21.01
Exercised		-	$	-
Forfeited		-	$	-
Outstanding, December 31, 2018		398	$	17.09	$	493
Exercisable, December 31, 2018		143			$	313

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

				Weighted		Weighted
	Number of			Average Price		Average Fair
	Shares			per Share (3)		Value (3)
Outstanding & Unvested, December 31, 2017		33		$	16.08	$	516
Granted		6		$	21.04	$	135
Converted to common stock		(15	)	$	15.67	$	(238	)
Cancelled		(5	)	$	15.67	$	(70	)
Forfeited		-		$	-	$	-
Outstanding & Unvested, December 31, 2018		19		$	18.20	$	343