Note 6 - Financial Instruments and Fair Value (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

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

	At June 30, 2016						At December 31, 2015
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	—	$	—	$	6,417	$	—	$	—	$	6,650

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

	C ost Basis Amount		Gross Unrealized Loss In Accumulated OCI		Fair Value
June 30, 2016
Investment in auction rate securities	$	6,900	$	483	$	6,417
December 31, 2015
Investment in auction rate securities	$	7,150	$	500	$	6,650

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 6		June 30, 201 5		Reclassified into Income	June 30, 201 6		June 30, 201 5
Interest rate swaps	$	-	$	117	Interest Expense	$	-	$	(26	)

	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 6		June 30, 201 5		Reclassified into Income	June 30, 201 6		June 30, 201 5
Interest rate swaps	$	-	$	235	Interest Expense	$	-	$	(55	)

Fair Value Measurements, Nonrecurring [Table Text Block]

Description	Fair Value Measurements Using Significant Unobservable Inputs June 30, 2016		Loss during the Three Months Ended June 30, 2016			Loss during the Six Months Ended June 30, 2016
Long-lived assets held for sale	$	20,186	$	(400	)	$	(7,481	)