Note 1 - Basis of Consolidation and Presentation (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

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

	June 30 , 2017		December 31, 2016
	(In thousands)
Total carrying amounts of long-term debt	$	2,107	$	3,540
Estimated fair value of long-term debt	$	2,102	$	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 June 30, 2017
Money Market Funds	$	12,078	$	--	$	--	$	12,078
Commercial Paper		--		9,096		--		9,096
Eurodollar Deposit s		--		10,000		--		10,000
Total	$	12,078	$	19,096	$	--	$	31,174
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