Note 9 - Financial Instruments and Fair Value (Tables)

12 Months Ended

Dec. 31, 2012

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

	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

	At December 31, 2011
			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	Current Notional Amount		Fixed Interest Rate			Underlying Rate	Expiration Date	Fair Value
Interest Rate Swap	$	2,033		5.075	%	3 month LIBOR	July 1, 2015	$	(99	)
Interest Rate Swap		4,200		5.075	%	3 month LIBOR	July 1, 2015		(205	)
Interest Rate Swap		7,294		5.39	%	1 month LIBOR	December 31, 2014		(288	)
Interest Rate Swap		1,410		5.39	%	1 month LIBOR	December 31, 2014		(56	)
Interest Rate Swap		2,509		5.39	%	1 month LIBOR	December 31, 2014		(99	)
Interest Rate Swap		5,678		5.39	%	1 month LIBOR	December 31, 2014		(224	)
Interest Rate Swap		5,200		5.38	%	1 month LIBOR	June 29, 2015		(272	)
Interest Rate Swap		800		5.29	%	1 month LIBOR	June 30, 2015		(40	)
Interest Rate Swap		1,533		5.29	%	1 month LIBOR	June 30, 2015		(77	)
Interest Rate Swap		7,733		5.29	%	1 month LIBOR	June 30, 2015		(388	)
Interest Rate Swap		667		5.29	%	1 month LIBOR	June 30, 2015		(33	)
Interest Rate Swap		2,680		5.29	%	1 month LIBOR	June 30, 2015		(134	)

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	December 31, 2012		December 31, 2011
Interest Rate Swaps	Other Long-Term Liabilities	$	1,915	$	2,233

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

	December 31, 2012		December 31, 2011
Gain (loss) recognized in other comprehensive income (loss) on          interest rate swaps	$	317	$	(1,868	)