Note 10 - Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Income Tax Disclosure [Abstract]
Liability for Uncertain Tax Positions, Current					$ 402
Unrecognized Tax Benefits					449
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0	12			47
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	0
Unrecognized Tax Benefits, Interest on Income Taxes Expense				32
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	12	11	9
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0	0	0
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 0	$ 0	$ 0