Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	September 30, 2014
	Three months ended		Nine months ended
Net income	$	3,415	$	6,658
Basic shares outstanding:
Common stock		39,251		38,259
Diluted shares outstanding:
Common stock		39,251		38,259
Dilutive securities		2,396		2,638
Total		41,647		40,897

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

	2014
Volatility		48.59	%	–		49.27	%
Expected life (years)				6.00
Risk-free interest rate		1.81	%	–		2.08	%
Dividend yield				—
Fair value	$	14.71		–	$	17.26

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, 2013		7,334,745		$	12.33
Options granted		597,275			32.56
Options forfeited		(176,204	)		20.79
Options exercised		(2,337,968	)		15.15
Outstanding at September 30, 2014		5,417,848		$	13.06
Exercisable at September 30, 2014		3,984,890		$	10.46		6.3	$	88,822

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, 2013		754,214		$	15.57
Awards granted		553,281			34.02
Awards vested		(372,703	)		17.29
Awards forfeited		(69,565	)		33.28
Non-vested awards at September 30, 2014		865,227		$	25.21

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, 2013
Financial instruments:
Contingent consideration	$	—	$	—		$	(4,834	)	$	(4,834	)
Foreign currency derivative asset		—		61			—			61
Foreign currency derivative liability		—		(683	)		—			(683	)
As of September 30, 2014
Financial instruments:
Contingent consideration	$	—	$	—		$	(6,854	)	$	(6,854	)
Foreign currency derivative liability		—		(585	)		—			(585	)

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Foreign Currency Translation			Net investment hedge - foreign exchange contract			Net investment hedge - Australian denominated debt		Total
Balance at December 31, 2013	$	(6,625	)	$	483		$	205	$	(5,937	)
Change during 2014:
Before-tax amount		(5,138	)		(325	)		—		(5,463	)
Tax benefit		1,349			129			—		1,478
Total activity in 2014		(3,789	)		(196	)		—		(3,985	)
Balance at September 30, 2014	$	(10,414	)	$	287		$	205	$	(9,922	)