Asset purchases and acquisitions of businesses (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Mgt [Member]
Business Acquisition [Line Items]
Revenues	$ 396	$ 409
Net loss	(10,202)	(3,604)
Loss per share of Common Stock (in dollars per share)	$ (1.84)	$ (2.62)
Basic and diluted (in shares)	5,590,618	2,245,465
FanTD [Member]
Business Acquisition [Line Items]
Revenues	62	3
Net loss	(336)	(167)
Loss per share of Common Stock (in dollars per share)	$ 0	$ 0
Basic and diluted (in shares)	0	0
Avcom, Inc [Member]
Business Acquisition [Line Items]
Revenues	110	214
Net loss	125	(289)
Loss per share of Common Stock (in dollars per share)	$ 0	$ 0
Basic and diluted (in shares)	0	0
Pro Forma [Member]
Business Acquisition [Line Items]
Revenues	568	626
Net loss	$ (10,538)	$ (4,060)
Loss per share of Common Stock (in dollars per share)	$ (1.82)	$ (1.45)
Basic and diluted (in shares)	5,801,068	2,806,974