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Note 9 - Share-based Payments (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

		Year ended December 31,
		2018				2017
Risk-free interest rate, average			—				2.21
Expected option life, average (in years)			—				7.9
Expected price volatility, average			—				40.71
Expected dividend yield			—				2.83

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

		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value
As of December 31, 2016			850,232			$	8.06				5.78			$	3,001
Granted			105,000				9.90
Expired and canceled			(3,144	)			10.29
Forfeited prior to vesting			(8,996	)			11.01
Exercised			(178,662	)			5.90
As of December 31, 2017			764,430			$	8.78				6.48			$	1,038
Granted			—				—
Expired and canceled			(106,108	)			7.56
Forfeited prior to vesting			(34,066	)			10.79
Exercised			—				—
As of December 31, 2018			624,256			$	8.87				5.28			$	—
Vested and Expected to Vest at December 31, 2017			764,430			$	8.78				6.48			$	1,038
Vested at December 31, 2017			529,669			$	7.89				5.50			$	1,033
Vested and Expected to Vest at December 31, 2018			624,256			$	8.87				5.28			$	—
Vested at December 31, 2018			548,045			$	8.62				4.90			$	—

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

		2018				2017
Shares purchased under ESPP plan			23,789				9,110
Plan compensation expense		$	10			$	13

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Tabular disclosure of employee stock purchase plan activity.

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