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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

Summary of Reserved Shares of Common Stock for Future Issuance

The Company has reserved for future issuance the following number of shares of common stock:


	June 30, 2016		December 31, 2015
Unvested restricted common stock		159,640		216,716
Common stock options and RSU's outstanding		3,150,718		2,231,057
Shares available for issuance under the 2014 Plan ⁽¹⁾		1,305,784		1,318,732
Shares available for issuance under the ESPP ⁽²⁾		803,105		440,304
Total		5,419,247		4,206,809

⁽¹⁾

On January 1, 2016, the shares reserved for future grants under the 2014 Plan increased by 986,800 shares pursuant to the 2014 Plan Evergreen Provision.

⁽²⁾

On February 28, 2016, the shares reserved for future issuance under the ESPP increased by 379,430 shares pursuant to the ESPP Evergreen Provision.

Compensation Cost Related to Share-Based Awards

The Company has recognized the following compensation cost related to share-based awards:


	Three Months Ended				Six Months Ended
	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
	(in thousands)				(in thousands)
Research and development	$	365	$	397	$	757	$	962
General and administrative		857		698		1,716		1,261
Total	$	1,222	$	1,095	$	2,473	$	2,223

Schedule of Compensation Expense by Type of Award

Compensation expense by type of award:


	Three Months Ended				Six Months Ended
	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
	(in thousands)				(in thousands)
Stock options	$	1,021	$	908	$	2,149	$	1,607
Restricted stock		27		142		13		542
Restricted stock units		158		24		264		32
Employee stock purchase plan		16		21		47		42
Total	$	1,222	$	1,095	$	2,473	$	2,223