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Note 6 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

		2018				2017
Stock Options		$	817			$	642
Restricted Stock Grants			73				11
Total		$	890			$	653

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

		Years Ended December 31,
		2018				2017
Risk-free interest rate			2.6	%			1.7	%
Volatility factor			46.8	%			50.0	%
Weighted average expected life (years)			5.0				5.0
Forfeiture rate			10.0	%			10.0	%
Dividends			0.0	%			0.0	%

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

Year Ended December 31, 2018
		Number of Shares				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term				Aggregate Intrinsic Value
Shares under Option – January 1			1,860,211			$	5.96
Options Granted			217,500				9.68
Options Exercised			(422,793	)			4.49
Options Forfeited or Expired			(78,831	)			11.75
Shares under option – December 31			1,576,087			$	6.58				3.50			$	1,946
Vested and Expected to Vest - December 31			1,475,570			$	6.56				3.37			$	1,851
Options Exercisable – December 31			1,064,127			$	5.89				2.69			$	1,565

Year Ended December 31, 2017
		Number of Shares				Weighted Average Exercise Price Per Share
Shares under Option – January 1			2,323,581			$	6.22
Options Granted			244,750				5.60
Options Exercised			(333,305	)			4.29
Options Forfeited or Expired			(374,815	)			8.11
Shares under option – December 31			1,860,211			$	5.06
Options Exercisable – December 31			1,649,594			$	4.63

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

				Option Outstanding												Options Exercisable
Range of Exercise Prices				Number of Outstanding Options – December 31, 2018				Weighted- Average Remaining Contractual Life				Weighted- Average Exercise Price				Number of Options Exercisable at December 31, 2018				Weighted- Average Exercise Price
$3.22	-	$3.99			346,148				2.56				3.79				346,148			$	3.79
$4.00	-	$5.99			451,023				4.72				4.94				217,979				4.72
$6.00	-	$9.99			528,916				3.79				7.72				300,000				6.42
$10.00	-	$15.00			250,000				2.00				11.00				200,000				10.00
$3.22	-	$15.00			1,576,087				3.50				6.58				1,064,127			$	5.89

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