Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	[1]	Dec. 31, 2016	[2]
Payables and Accruals [Abstract]
Accounts payable	$ 938		$ 1,593
Accrued liabilities	2,368		3,212
Accrued compensation	2,275		1,904
Other current liabilities	137		435
Total	$ 5,718		$ 7,144

[1] Reflects the effect of the OncoCyte Deconsolidation.

[2] Reflects the effect of the Asterias Deconsolidation