Note 7 - Segments - Segment Reporting (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
DPC [Member] | Operating Segments [Member]
Revenues	$ 808,000	$ 1,141,000	$ 2,795,000	$ 3,783,000
Intersegment revenues	155,000		277,000	119,000
Total revenues	963,000	$ 1,141,000	3,072,000	3,902,000
Depreciation and amortization	19,000	14,000	56,000	50,000
Operating income (loss)	(316,000)	$ (198,000)	(845,000)	$ (330,000)
Financial income (expense), net	$ (4,000)		$ (4,000)
Impairment of invesment
Net loss	$ (320,000)	$ (198,000)	$ (849,000)	$ (330,000)
Expenditures for segment assets, net of retirements	4,000	24,000	54,000	76,000
Total assets as of September 30, 2015	2,252,000	3,588,000	2,252,000	3,588,000
DPL [Member] | Operating Segments [Member]
Revenues	607,000	$ 1,090,000	$ 2,667,000	$ 3,127,000
Intersegment revenues	0
Total revenues	607,000	$ 1,090,000	$ 2,667,000	$ 3,127,000
Depreciation and amortization	36,000	47,000	118,000	132,000
Operating income (loss)	(101,000)	20,000	62,000	148,000
Financial income (expense), net	$ 25,000	$ 28,000	22,000	$ 23,000
Impairment of invesment			(106,000)
Net loss	$ (76,000)	$ 48,000	(22,000)	$ 171,000
Expenditures for segment assets, net of retirements	21,000	39,000	76,000	25,000
Total assets as of September 30, 2015	$ 2,930,000	$ 3,292,000	$ 2,930,000	$ 3,292,000
Intersegment Eliminations [Member]
Revenues
Intersegment revenues	$ (155,000)		$ (277,000)	$ (119,000)
Total revenues	$ (155,000)		$ (277,000)	$ (119,000)
Depreciation and amortization
Operating income (loss)
Financial income (expense), net
Impairment of invesment
Net loss
Expenditures for segment assets, net of retirements
Total assets as of September 30, 2015
Revenues	$ 1,415,000	$ 2,231,000	$ 5,462,000	$ 6,910,000
Intersegment revenues
Total revenues	$ 1,415,000	$ 2,231,000	$ 5,462,000	$ 6,910,000
Depreciation and amortization	55,000	61,000	174,000	182,000
Operating income (loss)	(417,000)	(178,000)	(783,000)	(182,000)
Financial income (expense), net	$ 21,000	$ 28,000	18,000	$ 23,000
Impairment of invesment			(106,000)
Net loss	$ (396,000)	$ (150,000)	(871,000)	$ (159,000)
Expenditures for segment assets, net of retirements	25,000	63,000	130,000	101,000
Total assets as of September 30, 2015	$ 5,182,000	$ 6,479,000	$ 5,182,000	$ 6,479,000