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Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Jan. 01, 2016 | Oct. 02, 2015 | Jul. 03, 2015 | Apr. 03, 2015 | Jan. 02, 2015 | Oct. 03, 2014 | Jul. 04, 2014 | Apr. 04, 2014 | Jan. 01, 2016 | Jan. 02, 2015 | Jan. 03, 2014
Interim Period, Costs Not Allocable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 20,858 | $ 18,750 | $ 18,657 | $ 18,858 | $ 16,573 | $ 18,188 | $ 20,048 | $ 20,178 |  |  |
Gross profit | 14,664 | 12,799 | 12,361 | 12,899 | 9,403 | 11,869 | 13,667 | 13,884 | $ 52,723 | $ 48,823 | $ 50,309
Net loss | $ (842) | $ (1,752) | $ (1,599) | $ (2,340) | $ (2,538) | $ (2,706) | $ (1,789) | $ (1,359) | $ (6,533) | $ (8,392) | $ 398
Net loss per share - basic and diluted | $ (0.02) | $ (0.04) | $ (0.04) | $ (0.06) | $ (0.07) | $ (0.07) | $ (0.05) | $ (0.04) | $ (0.17) | $ (0.22) | $ 0.01

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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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