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Note 7 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

		Three Months Ended September 30,								Nine Months Ended September 30,
		2021				2020				2021				2020
Cost of sales		$	202			$	255			$	685			$	576
Selling, general, and administrative expense			395				618				1,752				1,730
Total		$	597			$	873			$	2,437			$	2,306

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, 2020			129,572			$	25.86
RSUs and PSAs granted			90,368				33.30
RSUs and PSAs vested (2)			(58,809	)			25.53
Unvested RSUs and PSAs as of September 30, 2021			161,131				30.26

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