Note 6 - Financial Instruments and Fair Value (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	At March 31, 2015						At December 31, 2014
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	—	$	—	$	6,905	$	—	$	—	$	6,905

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	Cost Basis Amount		Gross Unrealized Loss In Accumulated OCI		Fair Value
March 31, 2015
Investment in auction rate securities	$	7,425	$	520	$	6,905
December 31, 2014
Investment in auction rate securities	$	7,425	$	520	$	6,905

Schedule of Derivative Instruments [Table Text Block]

Agreement	Notional Amount		Fixed Interest Rate			Underlying Rate	Expiration Date	Fair Value
Interest Rate Swap	$	1,667		5.075	%	3 month LIBOR	July 1, 2015	$	(9	)
Interest Rate Swap		3,444		5.075	%	3 month LIBOR	July 1, 2015		(18	)
Interest Rate Swap		4,264		5.38	%	1 month LIBOR	June 29, 2015		(26	)
Interest Rate Swap		656		5.29	%	1 month LIBOR	June 30, 2015		(4	)
Interest Rate Swap		1,258		5.29	%	1 month LIBOR	June 30, 2015		(7	)
Interest Rate Swap		6,341		5.29	%	1 month LIBOR	June 30, 2015		(37	)
Interest Rate Swap		547		5.29	%	1 month LIBOR	June 30, 2015		(3	)
Interest Rate Swap		2,197		5.29	%	1 month LIBOR	June 30, 2015		(13	)

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		Fair Value at
Derivative Liabilities Designated as Hedging Instruments	Balance Sheet Location	March 31, 2015		December 31, 2014
Interest Rate Swaps	Other Long-Term Liabilities	$	117	$	235

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Three Months Ended				Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Three Months Ended
	March 31, 2015		March 31, 2014		Reclassified into Income	March 31, 2015			March 31, 2014
Interest rate swaps	$	118	$	187	Interest Expense	$	(29	)	$	(64	)