Stock Option Plans (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation Allocation

Stock-based compensation costs included in the consolidated statements of operations are presented below:

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2015		2014		2015		2014
Cost of products	$	21	$	—	$	55	$	—
Cost of services	105		—		203		—
Research and development	2,138		1,364		3,907		1,712
Selling, general and administrative	5,616		5,484		13,974		8,910
Total	$	7,880	$	6,848	$	18,139	$	10,622

Schedule of Stock Option Activity

Stock option activity under Intrexon's award plans was as follows:

	Number of Shares		Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (Years)
Balances at December 31, 2014	8,323,544		$	22.59		8.64
Granted	1,849,000		43.15
Adjustment due to dividend (Note 13)	312,795		25.40
Exercised	(638,790	)	(16.25		)
Forfeited	(342,678	)	(27.77		)
Expired	(142	)	(7.12		)
Balances at June 30, 2015	9,503,729		26.08			8.38
Exercisable at June 30, 2015	2,322,052		18.06			7.03
Vested and Expected to Vest at June 30, 2015(1)	7,930,652		25.25			8.28

(1) The number of stock options expected to vest takes into account an estimate of expected forfeitures.