Net Loss per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net loss attributable to Intrexon	$ (60,709)	$ (46,165)
Denominator:
Weighted average shares outstanding, basic and diluted (in shares)	152,948,058	127,693,336
Net loss attributable to Intrexon per share, basic and diluted (in usd per share)	$ (0.40)	$ (0.36)