Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

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

	Three months ended March 31, 2013
Volatility		48.66	%
Expected life (years)		6.00
Risk-free interest rate		1.02	%
Dividend yield		—
Fair value	$	6.63

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

	Number of options			Weighted average exercise price		Weighted average remaining contractual life (years)		Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2012		9,463,657		$	11.76
Options granted		364,600			14.24
Options forfeited		(137,202	)		15.34
Options exercised		(334,121	)		8.58
Outstanding at March 31, 2013		9,356,934		$	11.93		7.9	$	61,857
Exercisable at March 31, 2013		5,158,810		$	10.63		7.4	$	40,459

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

	Number of awards			Weighted average grant date fair value
Non-vested awards at December 31, 2012		189,412		$	13.68
Awards granted		508,690			14.08
Awards vested		—			—
Awards forfeited		(1,080	)		14.05
Non-vested awards at March 31, 2013		697,022		$	13.97

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
As of December 31, 2012
Financial instruments:
Interest rate swap	$	—	$	101	$	—	$	101
Contingent consideration		—		—		846		846
As of March 31, 2013
Financial instruments:
Interest rate swap	$	—	$	53	$	—	$	53
Contingent consideration		—		—		855		855