Stock-Based Awards

6 Months Ended

Jun. 30, 2015

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

6. Stock-Based Awards

The Company grants equity awards under its 2014 Stock Option and Incentive Plan and is authorized to issue common stock under its 2014 Employee Stock Purchase Plan. The Company also has outstanding stock-based awards under its Amended and Restated 2006 Stock Option Plan but is no longer granting awards under this plan. As of June 30, 2015, 1,799,099 shares are available for grant under the 2014 Stock Option and Incentive Plan, including 915,166 shares automatically added to the 2014 Stock Option and Incentive Plan on January 1, 2015 as a result of a provision in the plan, and 262,136 shares are available for issuance to participating employees under the 2014 Employee Stock Purchase Plan. The Company recorded stock-based compensation expense related to stock options and restricted common stock in the following expense categories of its condensed consolidated statements of operations:


	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Research and development	$	738	$	99	$	1,142	$	168
General and administrative		1,201		169		1,854		276

	$	1,939	$	268	$	2,996	$	444

As of June 30, 2015, the Company had an aggregate of $28,525 of unrecognized stock-based compensation cost, which is expected to be recognized over a weighted average period of 3.5 years. As of June 30, 2015, there were outstanding unvested service-based stock options held by nonemployees for the purchase of 13,552 shares of common stock.