Segment reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 90	$ 1	$ 104	$ 88
Cost of revenue	(5)	0	(5)	0
Gross margin	85	1	99	88
Operating profit/(loss)	(557)	(1,000)	(2,194)	(3,091)
Cash and cash equivalents	428	2,205	428	2,205	$ 648	$ 4,642
Property and equipment	5		5		11
Intangible assets	1,259		1,259		1,608
Goodwill	1,496		1,496		1,496
Additions:
Property and equipment					0
Intangible assets					0
Intellectual Property [Member]
Segment Reporting Information [Line Items]
Revenue	90	1	102	81
Cost of revenue	(5)	0	(5)	0
Gross margin	85	1	97	81
Operating profit/(loss)	13	(83)	(214)	(269)
Cash and cash equivalents	0		0		11
Property and equipment	0		0		0
Intangible assets	1,234		1,234		1,577
Goodwill	0		0		0
Additions:
Property and equipment					0
Intangible assets					0
Gaming - Continuing Operations [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	2	7
Cost of revenue	0	0	0	0
Gross margin	0	0	2	7
Operating profit/(loss)	(8)	(321)	(33)	(1,040)
Cash and cash equivalents	0		0		12
Property and equipment	2		2		6
Intangible assets	25		25		31
Goodwill	1,496		1,496		1,496
Additions:
Property and equipment					0
Intangible assets					0
Unallocated Corporate Other [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Cost of revenue	0	0	0	0
Gross margin	0	0	0	0
Operating profit/(loss)	(562)	(596)	(1,947)	(1,782)
Cash and cash equivalents	428		428		625
Property and equipment	3		3		5
Intangible assets	0		0		0
Goodwill	0		0		0
Additions:
Property and equipment					0
Intangible assets					0
Gaming -Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Revenue	176	297	640	615
Cost of revenue	(39)	(168)	(225)	(384)
Gross margin	137	129	415	231
Operating profit/(loss)	(229)	$ (443)	(787)	$ (1,184)
Cash and cash equivalents	0		0		807
Property and equipment	0		0		32
Intangible assets	0		0		809
Goodwill	$ 0		$ 0		4,948
Additions:
Property and equipment					41
Intangible assets					$ 790