v3.8.0.1
Stock-based Compensation (Tables)
 12 Months Ended
Dec. 30, 2017
Equity [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table summarizes stock-based compensation in our accompanying condensed consolidated statements of operations (in thousands):
 
Fiscal Year Ended
 
December 30, 2017
 
December 31, 2016
 
December 26, 2015
 
 
 
 
 
 
Cost of revenue
$
396

 
$
316

 
$
236

Selling and marketing
1,216

 
898

 
813

Research and development
1,771

 
1,103

 
760

General and administrative
6,310

 
4,153

 
3,116

Income (loss) from discontinued operations
—

 
14

 
589

   Total stock-based compensation
$
9,693

 
$
6,484

 
$
5,514
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table presents the assumptions used to estimate the fair value of options granted during the periods presented:
 
Fiscal Year Ended
 
December 30, 2017
 
December 31, 2016
 
December 26, 2015
Risk-free interest rate
1.86 - 2.21 %
 
1.19 - 2.23 %
 
N/A
Expected term (years)
6.25
 
6.25
 
N/A
Volatility
30.2 - 33.4 %
 
33.3 - 38.2 %
 
N/A
Expected dividend yield
—%
 
—%
 
N/A
Schedule of Share-based Compensation, Activity
A summary of stock option activity for the year ended December 30, 2017 was as follows (in thousands for shares and intrinsic value):
 
Stock Options
 
Restricted Stock Units
 
Shares
 
Weighted-Average Remaining Contractual Term (Years)
 
Weighted-Average Exercise Price
 
Aggregate Intrinsic Value
 
Shares
 
Weighted-Average Grant Date Fair Value
Outstanding as of December 31, 2016
4,312

 
6.45
 
$
6.64

 
$
13,042

 
1,780

 
$
7.08

Granted (1)
1,243

 
 
 
13.66

 
 
 
1,179

 
12.85

Settled (RSUs)
—

 
 
 
—

 
 
 
(554
)
 
7.66

Exercised
(841
)
 
 
 
4.65

 
 
 
—

 
—

Canceled and forfeited
(228
)
 
 
 
12.61

 
 
 
(555
)
 
7.09

Outstanding as of December 30, 2017
4,486

 
6.68
 
$
8.65

 
$
42,892

 
1,850

 
$
10.58

Vested and exercisable as of December 30, 2017
2,657

 
5.19
 
$
6.97

 
$
30,145

 
N/A
 
N/A
____________________________
(1) For RSUs, includes both time-based, performance-based, and market-based restricted stock units
Schedule of Stock by Class
As of December 30, 2017, we had reserved the following shares of common stock for future issuance in connection with the following (in thousands):
 
December 30, 2017
 
 
Options issued and outstanding
4,486

Restricted stock units issued and outstanding
1,850

Common stock available for stock-based award grants under incentive award plans
2,154

Common stock available for conversion of Series A Redeemable Convertible Preferred Stock
4,787

Total
13,277