Intangible assets, net

6 Months Ended

Jun. 30, 2015

Intangible assets, net [Abstract]

Intangible assets, net

5. Intangible assets, net

At June 30, 2015 and December 31, 2014, intangible assets and intangible assets net of amortization were comprised of the following (in thousands):

	June 30, 2015 (Unaudited)		December 31, 2014
Intangible assets	$	52,562	$	52,562
Accumulated amortization		(16,342)		(13,714)
Intangible assets, net	$	36,220	$	38,848

BioTime amortizes its intangible assets generally over an estimated period of 10 years on a straight-line basis. BioTime recognized $2.6 million and $2.7 million in amortization expense of intangible assets, included in research and development, during the six months ended June 30, 2015 and 2014, respectively.