Note 9 - Financial Instruments and Fair Value (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	At December 31, 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		-		-	$	6,231		-		-	$	6,650

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

	C ost Basis Amount		Gross Unrealized Loss In Accumulated OCI		Fair Value
December 31, 201 6
Investment in auction rate securities	$	6,700	$	469	$	6,231
December 31, 201 5
Investment in auction rate securities	$	7,150	$	500	$	6,650

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

	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Year Ended				Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Year Ended
	December 31, 201 6		December 31, 201 5		Reclassified into Income	December 31, 201 6		December 31, 201 5
Interest rate swaps	$	−	$	235	Interest Expense	$	−	$	(55	)

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

Description	Fair Value Measurements Using Significant Unobservable Inputs December 31 , 2016		Loss D uring the Year Ended December 31, 2016
Long-lived assets held for sale	$	13,955	$	(7,481	)