Note 12 - Income Taxes (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended
	Apr. 30, 2015	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Apr. 30, 2011
Note 12 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)			$ 2,447,000	$ 502,000	$ 2,983,000	$ 759,000
Effective Income Tax Rate Reconciliation, Percent			23.70%	7.30%	17.70%	4.70%
Tax Adjustments, Settlements, and Unusual Provisions			$ 2,700,000
Unrecognized Tax Benefits			11,700,000		$ 11,700,000		$ 16,400,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			2,200,000		2,200,000		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 Tax Payment	$ 1,200,000		1,600,000
Income Tax Examination, Interest Expense			1,100,000
Income Tax Examination, Penalties Accrued			$ 0		$ 0
Scenario, Forecast [Member]
Note 12 - Income Taxes (Details) [Line Items]
Income Tax Examination Tax Payment		$ 200,000
Income Tax Examination, Interest Expense		$ 1,100,000