Note 8 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014
Foreign Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year		2008
Foreign Tax Authority [Member] | Latest Tax Year [Member]
Open Tax Year		2014
Domestic Tax Authority [Member] | Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year		2008
Domestic Tax Authority [Member] | Latest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year		2014
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year		2008
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Open Tax Year		2014
Unrecognized Tax Benefits	$ 700,000	$ 700,000	$ 700,000
Deferred Tax Liabilities, Other	0	0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ (300,000)	$ (300,000)
Effective Income Tax Rate Reconciliation, Percent	39.10%	39.50%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 500,000	$ 500,000