Intangible assets, net (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017		Jun. 30, 2016	Dec. 31, 2016
Intangible assets, net [Abstract]
Intangible assets	$ 23,294	[1]		$ 25,703
Accumulated amortization	(15,230)	[1]		(15,497)
Intangible assets, net	8,064	[1]		$ 10,206
Amortization of intangible assets	$ 1,184		$ 2,292

[1] Reflects the effect of the OncoCyte Deconsolidation.