Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Interest Rate Swap Agreement 1 [Member]
Derivative [Line Items]
Current Notional Amount	$ 1,667
Fixed Interest Rate	5.075%
Expiration Date	Jul. 01, 2015
Fair Value	(9)
Interest Rate Swap Agreement 2 [Member]
Derivative [Line Items]
Current Notional Amount	3,444
Fixed Interest Rate	5.075%
Expiration Date	Jul. 01, 2015
Fair Value	(18)
Interest Rate Swap Agreement 3 [Member]
Derivative [Line Items]
Current Notional Amount	4,264
Fixed Interest Rate	5.38%
Expiration Date	Jun. 29, 2015
Fair Value	(26)
Interest Rate Swap Agreement 4 [Member]
Derivative [Line Items]
Current Notional Amount	656
Fixed Interest Rate	5.29%
Expiration Date	Jun. 30, 2015
Fair Value	(4)
Interest Rate Swap Agreement 5 [Member]
Derivative [Line Items]
Current Notional Amount	1,258
Fixed Interest Rate	5.29%
Expiration Date	Jun. 30, 2015
Fair Value	(7)
Interest Rate Swap Agreement 6 [Member]
Derivative [Line Items]
Current Notional Amount	6,341
Fixed Interest Rate	5.29%
Expiration Date	Jun. 30, 2015
Fair Value	(37)
Interest Rate Swap Agreement 7 [Member]
Derivative [Line Items]
Current Notional Amount	547
Fixed Interest Rate	5.29%
Expiration Date	Jun. 30, 2015
Fair Value	(3)
Interest Rate Swap Agreement 8 [Member]
Derivative [Line Items]
Current Notional Amount	2,197
Fixed Interest Rate	5.29%
Expiration Date	Jun. 30, 2015
Fair Value	$ (13)