Stock-Based Compensation

6 Months Ended

Jun. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

Note 7 — Stock-Based Compensation

Total stock-based compensation expense was recognized in our Condensed Consolidated Statements of Operations as follows (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Cost of goods sold	$	538	$	402	$	1,092	$	790
Research and development		4,620		3,125		9,217		6,324
General and administrative		2,941		2,737		5,974		5,513
Total stock-based compensation	$	8,099	$	6,264	$	16,283	$	12,627

During the three months ended June 30, 2017 and 2016, we granted 956,160 and 589,090 stock options, respectively, and these options had a weighted average grant-date fair value of $8.96 per share and $7.22 per share, respectively. During the six months ended June 30, 2017 and 2016, we granted 1,285,020 and 789,290 stock options, respectively, and these options had a weighted average grant-date fair value of $8.70 per share and $6.88 per share, respectively. We granted no RSUs during the three and six months ended June 30, 2017 and 2,000 RSUs were granted in the three and six months ended June 30, 2016.

As a result of stock issuances under our equity compensation plans, during the three months ended June 30, 2017 and 2016, we issued 1,130,164 and 451,391 shares of our common stock, respectively, and during the six months ended June 30, 2017 and 2016, we issued 2,648,769 and 1,313,937 shares of our common stock, respectively.