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Note 11 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

		Beginning				Granted				Exercised				Canceled				Ending
		Balance				During				During				During				Balance
		Outstanding				Period				Period				Period				Outstanding				Exercisable
Year ended December 31, 201 6
Number of shares			124,480				-0-				64,750				-0-				59,730				59,730
Weighted average exercise price Per share		$	4.57				-0-				4.62				-0-			$	4.51			$	4.51
Year ended December 31, 201 7
Number of shares			59,730				-0-				36,800				-0-				22,930				22,930
Weighted average exercise price Per share		$	4.51				-0-				3.97				-0-			$	5.36			$	5.36

		Beginning				Granted				Exercised				Canceled				Ending
		Balance				During				During				During				Balance
		Outstanding				Period				Period				Period				Outstanding				Exercisable
Year ended December 31, 201 6
Number of shares			100,000				125,000				-0-				-0-				225,000				65,000
Weighted average exercise price Per share		$	11.17				8.04				-0-				-0-			$	9.43			$	9.97
Year ended December 31, 201 7
Number of shares			225,000				140,000				-0-				-0-				365,000				185,000
Weighted average exercise price Per share		$	9.43				10.82				-0-				-0-			$	12.35			$	13.76

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

						Options Outstanding																Options Exercisable
										Weighted				Weighted												Weighted
										Average				Average												Average
Exercis e						Number				Remaining				Exercise				Intrinsic				Number				Exercise				Intrinsic
Price Range						Outstanding				Contractual				Price				Value				Exercisable				Price				Value
	$4.00	-	7.00				15,930				2.00			$	4.25			$	117,404				15,930			$	4.25			$	117,404
	$7.00	-	10.00				7,000				3.00			$	7.90			$	26,040				9,800			$	7.90			$	26,040
	$10.01	-	12.00				240,000				8.3			$	10.96			$	158,400				65,000			$	11.17			$	27,000
	$12.01	-	15.00				125,000				4.5			$	15.00			$	0				125,000			$	15.00			$	0

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

						Weighted
		Shares of				Average Grant
		Restricted				Date Fair
		Stock				Value
Unvested outstanding at January 1, 2016			4,000			$	10.97
Granted			17,524			$	8.45
Vested			(21,524	)		$	12.84
Forfeited/Cancelled			-
Unvested outstanding at December 31, 201 6			0			$	0
Granted			9,300			$	9.70
Vested			(9,300	)		$	9.70
Forfeited/Cancelled			-
Unvested outstanding at December 31, 201 7			-0-			$

						Weighted
		Shares of				Average Grant
		Restricted				Date Fair
		Stock Units				Value
Unvested outstanding at January 1, 201 6			94,580			$	12.55
Granted			60,400			$	8.56
Vested			(33,890	)		$	12.43
Forfeited/Cancelled			(7,000	)		$	11.68
Unvested outstanding at December 31, 201 6			114,090			$	10.47
Granted			39,720			$	10.88
Vested			(58,776	)		$	10.83
Forfeited/Cancelled			(125	)		$	14.61
Unvested outstanding at December 31, 201 7			94,909			$	10.43

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- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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