Note 3 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

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

		June 30, 2014						December 31, 2013
	Fair Value Hierarchy	Cost		Unrealized Gain		Fair Value		Cost		Unrealized Gain		Fair Value
Asset Backed	Level 2	$	403	$	-	$	403	$	455	$	1	$	456
Corporate Bonds	Level 2		162		1		163		164		1		165
US Treasuries	Level 2		3,400		-		3,400		4,500		-		4,500
Total		$	3,965	$	1	$	3,966	$	5,119	$	2	$	5,121