Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps	$ 249		$ (16)	$ 526	$ (7)
Interest rate swaps	52	53
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps	$ (85)		$ (103)	$ (170)	$ (208)