Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

At December 31, 2017 and 2016, intangible assets, primarily consisting of acquired patents and accumulated amortization were as follows (in thousands):

	December 31,
	2017 (1)		2016 (2)
Intangible assets	$	23,294	$	25,703
Accumulated amortization		(16,394)		(15,497)
Intangible assets, net	$	6,900	$	10,206

(1)	Reflects the effect of the OncoCyte Deconsolidation.
(2)	Reflects the effect of the Asterias Deconsolidation

Schedule of Intangible Assets Future Amortization Expense

Amortization of intangible assets for periods subsequent to December 31, 2017 is as follows (in thousands):

Year Ended December 31,	Amortization Expense
2018	$	2,338
2019		2,328
2020		1,553
2021		517
2022		164
Total	$	6,900