Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

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

	Nine months ended September 30, 2013
Volatility	48.37	to	48.83	%
Expected life (years)		6.00
Risk-free interest rate	0.97	to	1.69	%
Dividend yield		—
Fair value	$6.63	to	11.52

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

				Weighted average		Weighted average remaining		Aggregate intrinsic value
	Number of options			exercise price		contractual life (years)		(in thousands)
Outstanding at December 31, 2012		9,463,657		$	11.76
Options granted		525,100			16.68
Options forfeited		(344,052	)		15.92
Options exercised		(1,517,855	)		8.62
Outstanding at September 30, 2013		8,126,850		$	12.49		7.6	$	111,758
Exercisable at September 30, 2013		4,788,361		$	11.71		7.1	$	68,388

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		655,985			15.58
Awards vested		(75,370	)		13.40
Awards forfeited		(19,540	)		14.06
Non-vested awards at September 30, 2013		750,487		$	15.36

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 September 30, 2013
Financial instruments:
Contingent consideration	$	—	$	—	$	424	$	424
Foreign currency derivative		—		272		—		272

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 January 1, 2013	$	3,356		$	—	$	(173	)	$	3,183
Other comprehensive income (loss), net of tax		(7,453	)		138		379			(6,936	)
Balance at September 30, 2013	$	(4,097	)	$	138	$	206		$	(3,753	)