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Note 5 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

		Three-month period ended								Nine-month period ended
		September 30,				September 30,				September 30,				September 30,
		2021				2020				2021				2020
Stock options		$	131			$	204			$	468			$	674
Restricted stock grants			11				18				44				82
Total		$	142			$	222			$	512			$	756

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

		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (years)				Aggregate Intrinsic Value
Outstanding at January 1, 2021			1,217,163			$	6.50
Granted			56,500				8.50
Exercised			(184,429	)			4.46
Forfeited or expired			(24,578	)			7.35
Outstanding at September 30, 2021			1,064,656			$	6.94				3.83			$	978
Vested and expected to vest at September 30, 2021			995,875			$	6.91				3.71			$	958
Exercisable at September 30, 2021			769,123			$	6.77				3.14			$	889

X

- Definition

Tabular disclosure of share-based payment arrangement.

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