Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	[1]	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts payable	$ 2,359		$ 938
Accrued liabilities	1,639		2,368
Accrued compensation	2,456		2,275
Other current liabilities	9		137
Total	$ 6,463		$ 5,718

[1] Reflects the effect of the AgeX Deconsolidation.