Stock-Based Compensation

Stock-based compensation expense was attributable to:



	Three Months Ended				Nine Months Ended
	July 1, 2017		July 2, 2016		July 1, 2017		July 2, 2016
	(In thousands)
Stock options	$	362	$	790	$	1,292	$	3,273
Restricted stock units, including performance based awards	6,927		4,632		25,616		14,686
Total	$	7,289	$	5,422	$	26,908	$	17,959

Stock-based compensation expense was recognized as follows:



	Three Months Ended				Nine Months Ended
	July 1, 2017		July 2, 2016		July 1, 2017		July 2, 2016
	(In thousands)
Cost of sales	$	1,879	$	1,542	$	6,778	$	4,879
Selling, general and administrative	5,276		3,669		19,492		12,657
Research and development	134		211		638		423
Total	$	7,289	$	5,422	$	26,908	$	17,959

During the second quarter of 2017, the Company's stockholders approved the reservation of an additional 1.8 million shares of common stock for future issuance under the Company's 2009 Incentive Plan. As of July 1, 2017, an aggregate of 10.4 million shares were authorized for future issuance under the Company's stock plans, of which 7.0 million of such shares were issuable upon exercise of outstanding options and delivery of shares upon vesting of restricted stock units and 3.4 million shares of common stock were available for future grant.

Stock Options

Stock option activity was as follows:



	Number of Shares		Weighted- Average Exercise Price ($)	Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value of In-The-Money Options ($)
	(In thousands)				(In thousands)
Outstanding as of October 1, 2016	5,514		12.75	4.10	81,659
Granted	—		—
Exercised/Cancelled/Forfeited/Expired	(1,843	)	14.62
Outstanding as of July 1, 2017	3,671		11.81	4.03	94,312
Vested and expected to vest as of July 1, 2017	3,662		11.78	4.02	94,176
Exercisable as of July 1, 2017	3,544		11.44	3.92	92,361

The aggregate intrinsic value in the preceding table represents the total pre-tax intrinsic value of in-the-money options that would have been received by the option holders had all option holders exercised such options at the Company's closing stock price on the date indicated.

As of July 1, 2017, unrecognized compensation expense for outstanding stock options was not material.

Restricted Stock Units

Activity with respect to the Company's restricted stock units was as follows:



	Number of Shares		Weighted- Average Grant Date Fair Value ($)	Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value ($)
	(In thousands)				(In thousands)
Outstanding as of October 1, 2016	3,998		19.57	1.35	110,183
Granted	1,285		33.94
Vested/Forfeited/Cancelled	(1,981	)	15.98
Outstanding as of July 1, 2017	3,302		27.31	1.71	123,816
Expected to vest as of July 1, 2017	2,538		26.46	1.62	95,169

As of July 1, 2017, unrecognized compensation expense of $44.4 million is expected to be recognized over a weighted average period of 1.7 years. Additionally, as of July 1, 2017, unrecognized compensation expense related to performance-based restricted stock units for which achievement of the performance criteria is not currently considered probable was $15.0 million.