Intangible assets, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017		Mar. 31, 2016	Dec. 31, 2016
Intangible assets, net [Abstract]
Intangible assets	$ 23,294	[1]		$ 25,703
Accumulated amortization	(14,648)	[1]		(15,497)
Intangible assets, net	8,646	[1]		$ 10,206
Amortization of intangible assets	$ 602		$ 1,314

[1] Reflects the effect of the OncoCyte Deconsolidation.