Note 12 - Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 12 - Income Taxes (Details) [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 41,200,000	$ 30,200,000	$ 30,800,000
Operating Loss Carryfoward Used to Offset Current Year Taxable Income	1,500,000	1,400,000	12,900,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount		3,300,000	2,700,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	39,500,000	19,200,000	7,900,000
Increase (Decrease) in Income Taxes Payable	15,600,000	7,600,000	2,900,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	9,287,000	6,610,000	2,853,000
Amounts Held in Additional Paid in Capital Pool to Increase Equity once Realized	6,300,000
State and Local Jurisdiction [Member]
Note 12 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	11,300,000
Foreign Tax Authority [Member]
Note 12 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	3,300,000
AMT [Member]
Note 12 - Income Taxes (Details) [Line Items]
Tax Credit Carryforward, Amount			171,000
Foreign Tax Credit [Member]
Note 12 - Income Taxes (Details) [Line Items]
Tax Credit Carryforward, Amount	$ 6,000,000	$ 3,600,000	$ 3,100,000