Note 6 - Income Taxes (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Tax Expense Benefit Period Increase Decrease	$ 1,700,000
Income Tax Expense (Benefit)	1,848,000	169,000
Effective Income Tax Rate, Continuing Operations	28.09%	4.61%
Unrecognized Tax Benefits	9,500,000		9,600,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5,800,000		6,000,000
Unrecognized Tax Benefits In Long Term Liabilities		2,900,000
Unrecognized Tax Benefits In Deferred Tax Assets		7,000,000
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance		$ 3,600,000