Note 6 - Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Note 6 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	$ 1,217,000	$ 2,640,000	$ 7,287,000	$ 7,279,000
Effective Income Tax Rate Reconciliation, Percent			36.44%	34.04%
Income Tax Credits and Adjustments			0
Unrecognized Tax Benefits	10,200,000		10,200,000		10,200,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6,200,000		6,200,000		6,300,000
Unrecognized Tax Benefits In Long Term Liabilities	2,700,000		2,700,000
Unrecognized Tax Benefits In Deferred Tax Assets	7,900,000		7,900,000
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance	4,000,000		4,000,000
Research Tax Credit Carryforward [Member]
Note 6 - Income Taxes (Details) [Line Items]
Income Tax Credits and Adjustments				$ 400,000