Three Months Ended

Nine Months Ended

September 27,
2014

September 27,
2014

September 28,
2013

Gross profit - GAAP

$ 17,092

39.6%

$ 25,253

42.1%

$  49,907

38.0%

$ 65,789

41.4%

Non-cash compensation expense (1)

277

0.7

238

0.4

807

0.6

652

0.4

Gross profit - Non-GAAP

$ 17,369

40.3%

$ 25,491

42.5%

$  50,714

38.6%

$ 66,441

41.8%

Income (loss) from operations - GAAP

$ (3,251)

(7.5)%

$   4,266

7.1%

$ (19,178)

(14.6)%

$   2,885

1.8%

Non-cash compensation expense (1)

1,816

4.2

1,728

2.9

5,782

4.4

4,854

3.1

Income (loss) from operations - Non-GAAP

$ (1,435)

(3.3)%

$   5,994

10.0%

$ (13,396)

(10.2)%

$   7,739

4.9%

Net income (loss) - GAAP

$ (3,148)

(7.3)%

$   4,433

7.4%

$ (19,105)

(14.5)%

$   2,777

1.7%

Non-cash compensation expense (1)

1,816

4.2

1,728

2.9

5,782

4.4

4,854

3.1

Net income (loss) - Non-GAAP

$ (1,332)

(3.1)%

$   6,161

10.3%

$ (13,323)

(10.1)%

$   7,631

4.8%

Diluted net income (loss) per share  - GAAP

$   (0.09)

$     0.12

$     (0.57)

$     0.08

Non-cash compensation expense

0.05

0.05

0.17

0.13

Diluted net income (loss) per share - Non-GAAP

$   (0.04)

$     0.17

$     (0.40)

$     0.21

Shares used to compute diluted net income (loss) per share - GAAP and Non-GAAP

33,572

35,804

33,261

35,738

(1) Includes stock-based compensation as follows:

Three Months Ended

Nine Months Ended

September 27,
2014

September 28,
2013

September 27,
2014

September 28,
2013

Cost of net revenue

$                      277

$                      238

$                          807

$                      652

Research and development

574

537

1,869

1,534

Selling, general and administrative

965

953

3,106

2,668

Total

$                   1,816

$                   1,728

$                       5,782

$                   4,854