Note 1 - Basis of Consolidation and Presentation (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

	March 3 1 , 201 7		December 31, 201 6
	(In thousands)
Total carrying amounts of long-term debt	$	2,724	$	3,540
Estimated fair value of long-term debt	$	2,718	$	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 March 31, 2017
Money Market Funds	$	11,006	$	--	$	--	$	11,006
Commercial Paper		--		23,584		--		23,584
Total	$	11,006	$	23,584	$	--	$	34,590
As of December 31, 201 6
Money Market Funds	$	11,200	$	--	$	--	$	11,200
Commercial Paper		--		21,450		--		21,450
Total	$	11,200	$	21,450	$	--	$	32,650