Segment reporting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 104	$ 94
Cost of revenue	(5)
Gross margin	99	$ 94
Operating loss	(2,722)	(4,020)
Cash and cash equivalents	359	648	$ 4,372
Property and equipment	35	11
Intangible assets	730	1,608	1,714
Goodwill	1,496	$ 1,496	$ 1,496
Additions:
Property and equipment	$ 35
Intangible assets		$ 354
Goodwill	$ 4,948
Unallocated Corporate Other [Member]
Segment Reporting Information [Line Items]
Revenue
Cost of revenue
Gross margin
Operating loss	$ (2,422)	$ (2,240)
Cash and cash equivalents	359	625
Property and equipment	$ 35	$ 5
Intangible assets
Goodwill		$ 0
Additions:
Property and equipment
Intangible assets
Goodwill
Gaming - Continuing Operations [Member]
Segment Reporting Information [Line Items]
Revenue	$ 2	$ 8
Cost of revenue
Gross margin	$ 2	$ 8
Operating loss	$ (32)	(1,379)
Cash and cash equivalents		12
Property and equipment		6
Intangible assets	$ 20	31
Goodwill	$ 1,496	$ 1,496
Additions:
Property and equipment
Intangible assets
Goodwill
Gaming -Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Revenue	$ 640	$ 963
Cost of revenue	(225)	(610)
Gross margin	415	353
Operating loss	$ (1,068)	(1,609)
Cash and cash equivalents		807
Property and equipment		32
Intangible assets		809
Goodwill		4,948
Additions:
Property and equipment		41
Intangible assets		$ 790
Goodwill
Intellectual Property [Member]
Segment Reporting Information [Line Items]
Revenue	$ 102	$ 86
Cost of revenue	(5)
Gross margin	97	$ 86
Operating loss	$ (268)	(401)
Cash and cash equivalents		$ 11
Property and equipment
Intangible assets	$ 710	$ 1,577
Goodwill		$ 0
Additions:
Property and equipment
Intangible assets
Goodwill