Note 6 - Financial Instruments and Fair Value (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

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

	At June 30, 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	$	—	$	—	$	6,650	$	—	$	—	$	6,905

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

	C ost Basis Amount		Gross Unrealized Loss In Accumulated OCI		Fair Value
June 30, 2015
Investment in auction rate securities	$	7,150	$	500	$	6,650
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		—
Interest Rate Swap		3,444		5.075%	3 month LIBOR	July 1, 2015		—

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	June 30 , 201 5		December 31, 2014
Interest Rate Swaps	Other Long-Term Liabilities	$	—	$	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
	June 30, 201 5		June 30, 201 4		Reclassified into Income	June 30, 201 5			June 30, 201 4
Interest rate swaps	$	117	$	184	Interest Expense	$	(26	)	$	(47	)

	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Six Months Ended				Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Six Months Ended
	June 30, 201 5		June 30, 201 4		Reclassified into Income	June 30, 201 5			June 30, 201 4
Interest rate swaps	$	235	$	371	Interest Expense	$	(55	)	$	(111	)