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Basic and Diluted Net Income (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 28, 2018
Earnings Per Share [Abstract] |
Summary of Computation of Basic and Diluted Net Income (Loss) Per Share | The following table sets forth the computation of basic and diluted net income (loss) per share (in thousands except per share amounts):
|  | Years Ended |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 4,968 |  |  | $ | (2,139 | ) |  | $ | (12,129 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares: |  |  |  |  |  |  |  |  |  |  |  |
Common shares outstanding |  |  | 42,598 |  |  |  | 41,025 |  |  |  | 40,352 |
Less: Unvested restricted stock |  |  | (11 | ) |  |  | (21 | ) |  |  | (23 | )
Denominator for basic calculation |  |  | 42,587 |  |  |  | 41,004 |  |  |  | 40,329 |
Weighted average effects of potentially diluted common stock: |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 2,360 |  |  |  | — |  |  |  | — |
Unvested restricted stock |  |  | 10 |  |  |  | — |  |  |  | — |
Restricted stock units |  |  | 300 |  |  |  | — |  |  |  | — |
Denominator for diluted calculation |  |  | 45,257 |  |  |  | 41,004 |  |  |  | 40,329 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.12 |  |  | $ | (0.05 | ) |  | $ | (0.30 | )
Diluted |  | $ | 0.11 |  |  | $ | (0.05 | ) |  | $ | (0.30 | )
Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share | The following table sets forth (in thousands) the weighted average number of options to purchase shares of common stock, restricted stock, and restricted stock units with either exercise prices or unrecognized compensation cost per share greater than the average market price per share of the Company’s common stock, which were not included in the calculation of diluted per share amounts because the effects would be anti-dilutive.
|  | Years Ended |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Stock options |  |  | 315 |  |  |  | 2,237 |  |  |  | 4,069 |
Restricted stock and restricted stock units |  |  | — |  |  |  | 203 |  |  |  | 76 |
Total |  |  | 315 |  |  |  | 2,440 |  |  |  | 4,145 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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