Note 12 - Income Taxes (Detail) - Deferred Taxes (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current [Member]
Allowance for doubtful accounts	$ 2,415	$ 2,578
Loss on interest rate swap	40
Net operating loss carryforwards		1,224
Other deferred tax assets	440	329
Total deferred tax assets	2,895	4,131
Cash to accrual adjustments	(2,363)	(2,154)
Other deferred tax liabilities	(516)	(337)
Total deferred tax liabilities	(2,879)	(2,491)
Net deferred tax assets (liabilities)	16	1,640
Noncurrent [Member]
Loss on interest rate swap		131
Net operating loss carryforwards	144
Shared-based compensation	8,112	3,565
Tax credits		2,407
Foreign currency translation	60	960
Other deferred tax assets	1,303	1,115
Total deferred tax assets	9,619	8,178
Basis difference of intangible assets	(1,606)	(4,308)
Basis difference of property and equipment	(1,364)	(1,168)
Cash to accrual adjustments	(2,467)	(4,758)
Other deferred tax liabilities	(9)	(103)
Total deferred tax liabilities	(5,446)	(10,337)
Net deferred tax assets (liabilities)	$ 4,173	$ (2,159)