Note 10 - Equity Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	December 31,
	2013			2012			2011
Risk free interest rate	0.61%	to	1.02%	0.63%	to	0.64%	1.1%	to	1.51%
Expected volatility	53.6%	to	57.6%		57.60%			57.60%
Expected lives (years)		4			4			4
Expected dividend yield		0.00%			0.00%			0.00%

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]

	2013					2012
	Number of Shares			Weighted Average Exercise Price Per Share		Number of Shares			Weighted Average Exercise Price Per Share
Options and SAR's outstanding at beginning of year		1,793,685		$	8.30		2,108,003		$	7.26
Granted		413,500		$	12.55		204,000		$	12.06
Cancelled		(243,724	)	$	8.77		(212,749	)	$	6.58
Expired		(9,928	)	$	9.62		(7,714	)	$	1.68
Exercised		(440,207	)	$	8.71		(297,855	)	$	4.74
Options and SAR's outstanding at end of year		1,513,326		$	9.14		1,793,685		$	8.30

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	2013					2012
	Number of Shares			Weighted Average Granted Date Fair Value		Number of Shares			Weighted Average Granted Date Fair Value
Nonvested at Beginning of year		68,956		$	6.87		59,196		$	5.71
Granted		36,220		$	17.00		31,312		$	9.10
Cancelled		-		$	-		(25	)	$	3.05
Expired		-		$	-		-		$	-
Vested/Released		(25,585	)	$	5.95		(21,527	)	$	5.08
Nonvested at end of year		79,591		$	11.93		68,956		$	6.87