Note 1 - Basis of Consolidation and Presentation (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	September 30, 2017		December 31, 2016
	(In thousands)
Total carrying amounts of long-term debt	$	1,693	$	3,540
Estimated fair value of long-term debt	$	1,690	$	3,533

Fair Value, Measurements, Recurring [Member]

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
	(In thousands)
As of September 30, 2017
Money Market Funds	$	12,586	$	--	$	--	$	12,586
Commercial Paper		--		12,948		--		12,948
Eurodollar Deposits		--		10,008		--		10,008
Total	$	12,586	$	22,956	$	--	$	35,542
As of December 31, 2016
Money Market Funds	$	11,200	$	--	$	--	$	11,200
Commercial Paper		--		21,450		--		21,450
Total	$	11,200	$	21,450	$	--	$	32,650