Note 6 - Financial Instruments and Fair Value (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

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

	At September 30, 2013
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

	At December 31, 2012
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

Schedule of Derivative Instruments [Table Text Block]

Agreement	Notional Amount		Fixed Interest Rate			Underlying Rate	Expiration Date	Fair Value
Interest Rate Swap	$	1,911		5.075	%	3 month LIBOR	July 1, 2015	$	(61	)
Interest Rate Swap		3,948		5.075	%	3 month LIBOR	July 1, 2015		(126	)
Interest Rate Swap		6,840		5.39	%	1 month LIBOR	December 31, 2014		(169	)
Interest Rate Swap		1,322		5.39	%	1 month LIBOR	December 31, 2014		(33	)
Interest Rate Swap		2,354		5.39	%	1 month LIBOR	December 31, 2014		(58	)
Interest Rate Swap		5,326		5.39	%	1 month LIBOR	December 31, 2014		(132	)
Interest Rate Swap		4,888		5.38	%	1 month LIBOR	June 29, 2015		(185	)
Interest Rate Swap		752		5.29	%	1 month LIBOR	June 30, 2015		(27	)
Interest Rate Swap		1,441		5.29	%	1 month LIBOR	June 30, 2015		(53	)
Interest Rate Swap		7,269		5.29	%	1 month LIBOR	June 30, 2015		(265	)
Interest Rate Swap		627		5.29	%	1 month LIBOR	June 30, 2015		(23	)
Interest Rate Swap		2,519		5.29	%	1 month LIBOR	June 30, 2015		(92	)

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	September 30, 2013		December 31, 2012
Interest Rate Swaps	Other Long-Term Liabilities	$	1,224	$	1,915

Derivative Instruments, Gain (Loss) [Table Text Block]

(in thousands)	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
	September 30, 2013		September 30, 2012		Reclassified into Income	September 30, 2013			September 30, 2012
Interest rate swaps	$	165	$	97	Interest Expense	$	(60	)	$	(87	)

(in thousands)	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Nine Months Ended				Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Nine Months Ended
	September 30, 2013		September 30, 2012		Reclassified into Income	September 30, 2013			September 30, 2012
Interest rate swaps	$	692	$	90	Interest Expense	$	(230	)	$	(295	)