Investments in Joint Ventures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended	9 Months Ended		0 Months Ended				1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Intrexon Energy Partners, LLC	Sep. 30, 2014 Intrexon Energy Partners, LLC	Mar. 26, 2014 Intrexon Energy Partners, LLC	Mar. 26, 2014 Intrexon Energy Partners, LLC Investors	Oct. 31, 2013 Intrexon Energy Partners, LLC Investors	Mar. 26, 2014 Intrexon Energy Partners, LLC Maximum	Mar. 26, 2014 Intrexon Energy Partners, LLC Maximum Investors	Jan. 31, 2014 OvaXon, LLC	Sep. 30, 2014 OvaXon, LLC	Sep. 30, 2014 OvaXon, LLC	Oct. 31, 2013 S & I Ophthalmic, LLC	Sep. 30, 2014 S & I Ophthalmic, LLC	Sep. 30, 2014 S & I Ophthalmic, LLC	Dec. 31, 2013 S & I Ophthalmic, LLC
Schedule Of Investments In Joint Venture [Line Items]
Initial capital contribution						$ 25,000				$ 1,500			$ 5,000
Membership interest					50.00%		50.00%			50.00%			50.00%
Additional capital contribution			24,395	24,395				25,000	25,000
Net loss			1,537	2,747							1,044	1,828		659	2,447
Net assets											1,172	1,172		7,120	7,120	9,567
Investment	$ 4,146	$ 6,284									$ 586	$ 586		$ 3,560	$ 3,560	$ 4,784