Condensed Consolidated Statements of Comprehensive Income/(Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
NET (LOSS)/INCOME	$ (30,052)	$ (4,646)	$ 9,244	$ (68,344)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax	(487)	884	(1,219)	959
COMPREHENSIVE (LOSS)/INCOME	(30,539)	(3,762)	8,025	(67,385)
Less: Comprehensive loss attributable to noncontrolling interest	20	431	34	581
COMPREHENSIVE (LOSS)/INCOME ATTRIBUTABLE TO BIOTIME, INC. COMMON STHAREHOLDERS	$ (30,519)	$ (3,331)	$ 8,059	$ (66,804)