Note 11 - Long-term Debt (Details) - Credit Facility, Unused Fee Schedule (Revolver [Member], USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Jun. 30, 2013
Level II [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Average Unused Portion of the Revolver plus Outstanding Letters of Credit (in Dollars)		$ 60,000,000
Applicable Unused Revolver Fee Margin	0.50%
Minimum [Member] | Level I [Member]
Line of Credit Facility [Line Items]
Average Unused Portion of the Revolver plus Outstanding Letters of Credit (in Dollars)		$ 60,000,000
Applicable Unused Revolver Fee Margin	0.375%