Note 9 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Cost of sales	$	255	$	125	$	576	$	249
Selling, general, and administrative expense		618		416		1,730		967
Total	$	873	$	541	$	2,306	$	1,216

Schedule of Unvested Restricted Stock Units and Performance Share Awards Activity [Table Text Block]

	Number of RSUs and PSAs (1)			Weighted- Average Grant Date Fair Value
Unvested RSUs and PSAs as of December 31, 2019		85,170		$	23.56
RSUs and PSAs granted		97,834			26.61
Unvested RSUs and PSAs canceled		(3,752	)		23.56
RSUs and PSAs vested (2)		(49,680	)		23.56
Unvested RSUs and PSAs as of September 30, 2020		129,572			25.86