Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

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

	Three months ended June 30, 2014		Six months ended June 30, 2014
Net income	$	3,532	$	3,243
Basic shares outstanding:
Common stock		38,452		37,764
Diluted shares outstanding:
Common stock		38,452		37,764
Dilutive securities		2,488		2,758
Total		40,940		40,522

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

	2014
Volatility		49.01	%	—		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		453,125			31.54
Options forfeited		(109,268	)		18.72
Options exercised		(1,725,818	)		13.40
Outstanding at June 30, 2014		5,952,784		$	13.36
Exercisable at June 30, 2014		4,484,129		$	11.65		6.6	$	90,039

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		296,274			32.53
Awards vested		(336,310	)		16.53
Awards forfeited		(49,067	)		33.75
Non-vested awards at June 30, 2014		665,111		$	21.30

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 June 30, 2014
Financial instruments:
Contingent consideration	$	—	$	—		$	(11,657	)	$	(11,657	)
Foreign currency derivative liability		—		(2,701	)		—			(2,701	)

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		8,853			(7,123	)		—		1,730
Tax (expense) benefit		(3,576	)		2,817			—		(759	)
Total activity in 2014		5,277			(4,306	)		—		971
Balance at June 30, 2014	$	(1,348	)	$	(3,823	)	$	205	$	(4,966	)