Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	December 31,
	2013			2014		2015
United States	$	(14,757	)	$	8,033	$	(9,174	)
Foreign		(815	)		6,896		17,369
Total		(15,572	)		14,929		8,195

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	December 31,
	2013			2014			2015
Current:
Federal	$	5,145		$	16,081		$	1,284
State		1,340			2,131			348
Foreign		6,180			5,769			7,999
		12,665			23,981			9,631
Deferred:
Federal		(10,026	)		(13,175	)		(1,998	)
State		(2,156	)		(1,291	)		318
Foreign		(5,839	)		(5,080	)		(5,347	)
		(18,021	)		(19,546	)		(7,027	)
Income tax expense (benefit)	$	(5,356	)	$	4,435		$	2,604

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	December 31,
	2013			2014			2015
Expected tax expense (benefit)	$	(5,450	)	$	5,225		$	2,869
Increase (decrease) in income taxes resulting from:
State income taxes, net of federal benefit		(694	)		712			464
Non-deductible items		240			896			981
Impact of foreign jurisdictions		433			(2,587	)		(1,751	)
Other		115			189			41
Income tax expense (benefit)	$	(5,356	)	$	4,435		$	2,604

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2014			2015
Deferred tax assets:
Allowance for doubtful accounts	$	3,607		$	3,937
Basis difference on intangible assets		7,623			22,555
Net operating loss carryforwards		2,334			386
Share-based compensation		10,462			11,326
Foreign currency translation		7,805			4,037
Tax credits		683			2,699
Other deferred tax assets		1,903			3,270
Total deferred tax assets		34,417			48,210
Deferred tax liabilities:
Basis difference of property and equipment		(227	)		(485	)
Cash to accrual and other method adjustments		(166	)		(597	)
Other deferred tax liabilities		(566	)		(56	)
Total deferred tax liabilities		(959	)		(1,138	)
Net deferred tax asset		33,458			47,072

Summary of Income Tax Contingencies [Table Text Block]

Balance at January 1, 2013	$	327
Increase to prior year tax positions		28
Increase to current year tax positions		—
Expiration of the statute of limitations for the assessment of taxes		—
Decrease related to settlements		—
Balance at December 31, 2013	$	355
Increase to prior year tax positions		1,238
Increase to current year tax positions		—
Expiration of the statute of limitations for the assessment of taxes		—
Decrease related to settlements		—
Balance at December 31, 2014		1,593
Increase to prior year tax positions		612
Increase to current year tax positions		—
Expiration of the statute of limitations for the assessment of taxes		(281	)
Decrease related to settlements		—
Balance at December 31, 2015	$	1,924