Stock-based Compensation (Tables)

9 Months Ended

Oct. 01, 2017

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

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Total stock-based compensation expense for employees and non-employees recognized in the condensed consolidated statements of operations was as follows:

	Three Months Ended				Nine Months Ended
	October 1, 2017		September 25, 2016		October 1, 2017		September 25, 2016
	(in thousands)
Cost of revenue	$	38	$	9	$	123	$	15
Research and development	1,367		231		3,986		454
Sales and marketing	416		60		1,179		120
General and administrative	948		734		2,159		1,635
Total stock-based compensation expense	$	2,769	$	1,034	$	7,447	$	2,224

The above stock-based compensation expense related to the following equity-based awards:

	Three Months Ended				Nine Months Ended
	October 1, 2017		September 25, 2016		October 1, 2017		September 25, 2016
	(in thousands)
Stock options	$	858	$	1,034	$	2,539	$	2,224
RSU awards	1,603		—		3,553		—
ESPP shares	308		—		1,355		—
Total stock-based compensation expense	$	2,769	$	1,034	$	7,447	$	2,224