Note 12 - Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

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

	Shares Under Option			Weighted- Average Exercise Price
Outstanding—January 1, 2012:		180,942		$	16.50
Granted		139,000			10.96
Exercised		(6,000	)		9.04
Canceled		(78,500	)		22.64
Outstanding—December 31, 2012:		235,442		$	11.38
Granted		35,000			10.44
Exercised		(7,257	)		10.94
Canceled		(99,087	)		11.71
Outstanding—December 31, 2013:		164,098		$	10.99
Granted		-			-
Exercised		(77,708	)		10.88
Canceled		(42	)		11.22
Outstanding—December 31, 2014:		86,348		$	11.09
Options exercisable—December 31, 2014:		38,239		$	11.28

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

	2013		2012
Dividend yield		0%		0%
Volatility range		62.69%		57.88%—65.89%
Risk-free rate range		0.61%		0.64%—1.09%
Expected life (in years)		4.3%		4.2—6.5%
Fair value of options (per share)		$5.13		$5.54—6.06

Schedule of Share-based Compensation, Activity [Table Text Block]

	Shares Under Option			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value*
				(per share)		(in years)
Outstanding at January 1, 2014		164,098		$	10.99
Granted		-			-
Exercised		(77,708	)		10.88
Canceled/forfeited/expired		(42	)		11.22
Outstanding at December 31, 2014		86,348		$	11.09		5.3	$	3,518,524
Fully vested and exercisable at December 31, 2014		38,239		$	11.28		2.8	$	1,551,088

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

	Number of Options			Weighted- Average Grant Date Fair Value
Nonvested at January 1, 2014		68,039		$	6.11
Granted		-			-
Canceled/forfeited/expired		(25	)		6.34
Vested		(19,905	)		6.15
Nonvested at December 31, 2014		48,109		$	6.10

	Number of Shares			Weighted- Average Grant Date Fair Value (1)
Nonvested at January 1, 2014		9,500		$	18.17
Granted		12,524			37.15
Canceled/forfeited/expired		(9,500	)		18.17
Vested		(4,924	)		28.67
Nonvested at December 31, 2014		7,600		$	42.65

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

Exercise Price		Shares Under Outstanding Options		Weighted- Average Remaining Contractual Term		Shares Under Exercisable Options
				(in years)
	$10.44		15,000		3.2		15,000
	$10.90		6,000		2.4		6,000
	$10.90		41,400		7.4		-
	$11.22		11,948		5.9		5,239
	$11.54		4,000		2.2		4,000
	$11.75		4,000		1.2		4,000
	$14.32		4,000		0.2		4,000
			86,348		5.3		38,239