Note 2 - Supplemental Cash Flow Disclosure (Tables)

12 Months Ended

Dec. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Year Ended December 31,
	2014			2013		2012
	(Dollars in thousands)
Cash paid for:
Interest, net of interest capitalized	$	1,843		$	-	$	1,083
Income taxes	$	2,793		$	5,161	$	577
Non-cash investing and financing activities:
Unrealized holding gains (losses) on marketable securities	$	(1,120	)	$	6,737	$	12,078