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Note 2 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

		Awards Available				Options Outstanding				Weighted Average Exercise Price
Balance December 31, 2018			805				17,491			$	6.49
Plan amendment			4,000				—				—
Stock option awards granted			(866	)			866				6.72
Stock option awards exercised			—				(251	)			3.75
Stock option awards cancelled			124				(124	)			7.25
Balance September 30, 2019			4,063				17,982			$	6.53

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2019				2018
Expected Life in Years			5.5				5.5
Expected Volatility			81.0	%			82.0	%
Expected Dividend Yield			0.0	%			0.0	%
Risk-Free Interest Rate			2.0	%			2.8	%

X

- Definition

Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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