Note 12 - Income Taxes (Details) - USD ($)	1 Months Ended	3 Months Ended			9 Months Ended
	Apr. 30, 2015	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Apr. 30, 2011
Note 12 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)		$ 2,103,000		$ (573,000)	$ 5,086,000	$ 186,000
Effective Income Tax Rate Reconciliation, Percent		15.80%		(5.40%)	16.90%	0.70%
Tax Adjustments, Settlements, and Unusual Provisions			$ 2,700,000
Unrecognized Tax Benefits		$ 11,200,000			$ 11,200,000		$ 16,400,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		2,400,000			2,400,000		4,800,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		100,000			100,000		$ 500,000
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority								$ 10,500,000
Income Tax Examination, Penalties Accrued		0			$ 0
Income Tax Examination Tax Payment			1,600,000
Income Tax Examination, Interest Expense			$ 1,100,000
Internal Revenue Service (IRS) [Member] | Domestic Tax Authority [Member]
Note 12 - Income Taxes (Details) [Line Items]
Income Taxes Paid	$ 1,200,000	100,000
Interest Paid		$ 1,000,000