Note 4 - Investments (Details) - Unaudited Summarized Financial Information for NKD Enterprises, LLC - Operations (NKD Enterprises LLC [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
NKD Enterprises LLC [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,782	$ 1,789
Operating income (loss)	(2)	85
Net income (loss)	(2)	85
Current assets	260	180
Non-current assets	3,004	3,007
Current liabilities	328	249
Stockholders’ equity	$ 2,936	$ 2,938