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Note 4 - Unaudited Summarized Financial Information for NKD Enterprises, LLC - Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenues	$ 2,188	$ 2,050
Operating loss	(152)	(168)
Net loss	(152)	(168)
NKD Enterprises LLC [Member]
Current assets	115	107
Non-current assets	3,005	3,002
Current liabilities	563	400
Stockholders’ equity	$ 2,557	$ 2,709

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