Net Loss Per Share - Historical Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Numerator:
Net income (loss) attributable to Intrexon	$ 4,115	$ (36,311)
Accretion of dividends on redeemable convertible preferred stock		(6,405)
Net income (loss) attributable to common shareholders	$ 4,115	$ (42,716)
Denominator:
Weighted average shares outstanding, basic	97,325,729	5,661,741
Weighted average effect of dilutive stock options and warrants	2,012,669
Weighted average shares outstanding, diluted	99,338,398	5,661,741
Net income (loss) attributable to common shareholders per share, basic	$ 0.04	$ (7.54)
Net income (loss) attributable to common shareholders per share, diluted	$ 0.04	$ (7.54)