Note 2 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended			9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	[1]	Sep. 30, 2015 USD ($)		Sep. 30, 2014 USD ($)	[1]
Goodwill, Impairment Loss				$ 0
Number of Reporting Units				1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ (3,900,000)	$ (1,355,000)		$ (5,155,000)	[1]	$ (1,421,000)

[1] In the third quarter of 2015, the Company recorded foreign currency translation adjustments totaling approximately $4.0 million primarily related to goodwill, intangible assets and fixed assets for certain acquired international subsidiaries.