Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

	Three months ended March 31,
	2015		2016
Net income	$	2,024	$	3,260
Basic shares outstanding:
Common stock		40,418		40,805
Diluted shares outstanding:
Common stock		40,418		40,805
Dilutive securities (1)		2,262		1,557
Total		42,680		42,362

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, 2015		3,766,868		$	13.28
Options granted		—			—
Options forfeited		(46,346	)		33.13
Options exercised		(74,121	)		9.99
Outstanding at March 31, 2016		3,646,401		$	13.10
Exercisable at March 31, 2016		3,377,368		$	11.51		5.1	$	61,718

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, 2015		1,315,522		$	34.30
Awards granted		685,280			27.68
Awards vested		(238,094	)		24.28
Awards forfeited		(130,237	)		35.96
Non-vested awards at March 31, 2016		1,632,471		$	32.85

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, 2015
Financial instruments:
Foreign currency derivative asset	$	—	$	848		$	—		$	848
Foreign currency derivative liability		—		(1,215	)		—			(1,215	)
As of March 31, 2016
Financial instruments:
Contingent consideration	$	—	$	—		$	(7,635	)	$	(7,635	)
Foreign currency derivative liability		—		(2,122	)		—			(2,122	)

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

	Foreign Currency Translation			Net investment hedge - foreign exchange contract			Total
Balance at December 31, 2015	$	(33,716	)	$	7,713		$	(26,003	)
Change during 2016:
Before-tax amount		818			(107	)		711
Tax (expense) benefit		484			42			526
Total activity in 2016		1,302			(65	)		1,237
Balance at March 31, 2016	$	(32,414	)	$	7,648		$	(24,766	)