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Stockholders' Equity - Summary of Activity in Stock Option Plan (Details) - $ / shares | 12 Months Ended
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Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] |  |  |
Shares Available for Grant, Beginning Balance | 854,117 | 476,545 | 741,978
Shares Available for Grant, Additional shares reserved | 1,000 | 503,306 | 52,128
Shares Available for Grant, Options granted | (170,300) | (158,300) | (149,600)
Shares Available for Grant, Restricted stock granted | (227,905) | (62,225) | (234,012)
Shares Available for Grant, Options cancelled | 174,870 | 27,957 | 123,679
Shares Available for Grant, Awards cancelled | 146,000 | 79,890 |
Shares Available for Grant, Options expired | (7,000) | (13,056) | (57,628)
Shares Available for Grant, Ending Balance | 770,782 | 854,117 | 476,545
Outstanding, Number of Shares, Beginning Balance | 833,795 | 1,102,842 | 1,570,543
Number of Shares, Options granted | 170,300 | 158,300 | 149,600
Number of Shares, Options exercised | (277,733) | (399,390) | (493,622)
Number of Shares, Options cancelled | (174,870) | (27,957) | (123,679)
Number of Shares, Ending Balance | 551,492 | 833,795 | 1,102,842
Weighted Average Exercise Price, Beginning Balance | $ 4.88 | $ 3.97 | $ 3.63
Weighted Average Exercise Price, Options granted | 9.38 | 8.61 | 5.69
Weighted Average Exercise Price, Options exercised | 3.70 | 3.76 | 3.03
Weighted Average Exercise Price, Options cancelled | 4.71 | 6.13 | 5.64
Weighted Average Exercise Price, Ending Balance | $ 6.92 | $ 4.88 | $ 3.97

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- Definition Share based compensation arrangement by share based payment award number of shares available for grant additional shares reserved. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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