Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

The following table summarizes the Company's stock option activity, including grants to non-employees, for the year ended December 31, 2013 and the three months ended March 31, 2014:

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)

Options outstanding at December 31, 2012		2,584,553		$	0.40		8.70
Options assumed through merger with SafeStitch		709,550			3.75
Granted		603,139			2.20
Cancelled		(6,129	)		0.40
Exercised		(68,227	)		0.80

Options outstanding at December 31, 2013		3,822,887		$	1.30		7.95
Granted		787,300			8.11
Cancelled		(11,536	)		0.35
Exercised		(13,838	)		0.52
Options outstanding at March 31, 2014		4,584,813		$	2.47		7.83

Schedule of Stock Options Outstanding

The following table summarizes information about stock options outstanding at March 31, 2014:

	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)

Exercisable at March 31, 2014		2,132,813	$	1.44		6.51
Vested or expected to vest at March 31, 2014		4,372,135	$	2.30		7.75

Schedule of Unvested Stock Option Activity

The following table summarizes the unvested stock option activity:

				Weighted-Average
	Number of Shares			Fair Value
Unvested options at December 31, 2012		1,707,536		$	0.40
Unvested options assumed through merger with SafeStitch		223,200			2.45
Granted		603,139			0.95
Vested		(711,818	)		1.25
Forfeited		(5,490	)		0.20

Unvested options at December 31, 2013		1,816,566		$	1.10
Granted		787,300			3.10
Vested		(132,971	)		.85
Forfeited		(84	)		.20

Unvested options at March 31, 2014		2,470,811		$	1.72