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Basic and Diluted Loss Per Share (Tables) | 6 Months Ended
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Jul. 01, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted net loss per share (in thousands except per share amounts):
|  | Three Months Ended |  | Six Months Ended |
|  | July 1, 2016 |  | July 3, 2015 |  | July 1, 2016 |  | July 3, 2015 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (2,143) |  | $ | (1,599) |  | $ | (10,184) |  | $ | (3,938) |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares and denominator for basic and diluted calculation: |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 40,225 |  |  | 39,173 |  |  | 40,112 |  |  | 38,876 |
Less: Unvested restricted stock |  |  | 15 |  |  | 107 |  |  | 15 |  |  | 107 |
Denominator for basic and diluted calculation |  |  | 40,210 |  |  | 39,066 |  |  | 40,097 |  |  | 38,769 |
Net loss per share – basic and diluted |  | $ | (0.05) |  | $ | (0.04) |  | $ | (0.25) |  | $ | (0.10) |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following table sets forth the weighted average number of options and warrants to purchase shares of common stock and restricted stock and units, which were not included in the calculation of diluted per share amounts because the effects would be anti-dilutive (in thousands).
|  | Three Months Ended |  | Six Months Ended |
|  | July 1, 2016 |  | July 3, 2015 |  | July 1, 2016 | July 3, 2015 |
Options |  |  | 3,199 |  |  | 1,561 |  |  | 2,994 |  |  | 1,396 |
Restricted stock and units |  |  | 258 |  |  | 137 |  |  | 188 |  |  | 211 |
Warrants |  |  | — |  |  | 385 |  |  | — |  |  | 345 |
Total |  |  | 3,457 |  |  | 2,083 |  |  | 3,182 |  |  | 1,952 |

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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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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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