Three Months Ended March 29, 2014

  Stock Options

  Restricted Stock Units

  Employee Stock Purchase Plan

  Total

Cost of goods sold 

$                 451

$                  2,108

$                    594

$     3,153

Research and development expense

2,124

7,917

1,623

11,664

Selling, general and administrative expense

1,391

5,186

663

7,240

       Total

$              3,966

$                15,211

$                 2,880

$   22,057

Three Months Ended December 28, 2013

Cost of goods sold 

$                 438

$                  2,395

$                    533

$     3,366

Research and development expense

2,616

8,728

1,153

12,497

Selling, general and administrative expense

1,476

4,996

534

7,006

       Total

$              4,530

$                16,119

$                 2,220

$   22,869

Three Months Ended March 30, 2013

Cost of goods sold 

$                 337

$                  2,120

$                    598

$     3,055

Research and development expense

1,440

7,116

1,480

10,036

Selling, general and administrative expense

1,157

4,764

601

6,522

       Total

$              2,934

$                14,000

$                 2,679

$   19,613