Note 15 - Segment Customers and Geographical Information - Segment Reporting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 7,596	$ 7,766
Inter-segment revenues
Total Revenues by Major Customer	7,596	7,766
Depreciation and amortization expenses	161	213
Operating income (loss)	(1,219)	(1,003)
Other income, net	77	16
Income taxes	(20)	(1)
Net loss	(1,122)	(1,096)
Capital expenditures for segment assets	85	306
Identifiable assets	5,472	5,099
Impairment		(110)
Operating Segments [Member] | DPC [Member]
Revenues	4,552	3,833
Inter-segment revenues	145	371
Total Revenues by Major Customer	4,697	4,204
Depreciation and amortization expenses		74
Operating income (loss)	(1,110)	(1,086)
Other income, net
Income taxes
Net loss
Capital expenditures for segment assets	32	58
Identifiable assets	3,152	2,384
Impairment
Operating Segments [Member] | DPL [Member]
Revenues	3,044	3,933
Inter-segment revenues
Total Revenues by Major Customer	3,044	3,933
Depreciation and amortization expenses	86	139
Operating income (loss)	(109)	83
Other income, net
Income taxes
Net loss
Capital expenditures for segment assets	53	248
Identifiable assets	2,320	2,715
Impairment
Intersegment Eliminations [Member]
Revenues
Inter-segment revenues	(145)	(371)
Total Revenues by Major Customer	(145)	(371)
Depreciation and amortization expenses
Operating income (loss)
Other income, net
Income taxes
Net loss
Capital expenditures for segment assets
Identifiable assets
Impairment
Intersegment Eliminations [Member] | DPC [Member]
Depreciation and amortization expenses	$ 75