Stock-Based Compensation

9 Months Ended

Sep. 30, 2016

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 September 30,				Nine months ended September 30,
	2016		2015		2016		2015
Cost of goods sold	$	396	$	274	$	1,186	$	837
Research and development		3,181		2,208		9,505		6,755
General and administrative		2,589		2,280		8,102		6,907
Total stock-based compensation	$	6,166	$	4,762	$	18,793	$	14,499

During the three months ended September 30, 2016 and 2015, we granted options to purchase 657,960 and 483,300 shares, respectively, at a weighted average grant-date fair value of $8.06 per share and $5.86 per share, respectively.  During the three months ended September 30, 2016 and 2015, we granted 56,000 and 120,000 restricted stock unit awards (RSUs), respectively.

During the nine months ended September 30, 2016 and 2015, we granted options to purchase 1,447,250 and 962,310 shares, respectively, at a weighted average grant-date fair value of $7.42 per share and $6.10 per share, respectively.  During the nine months ended September 30, 2016 and 2015, we granted 58,000 and 120,000 RSUs, respectively.

As a result of stock issuances under our equity compensation plans, during the three months ended September 30, 2016 and 2015, we issued 1,193,764 and 1,031,573 shares of our common stock, respectively, and during the nine months ended September 30, 2016 and 2015, we issued 2,507,701 and 2,000,823 shares of our common stock, respectively.