Quarterly Information (Unaudited) - Consolidated Statement of Income Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2016 |
Oct. 01, 2016 |
Jul. 02, 2016 |
Apr. 02, 2016 |
Jan. 02, 2016 |
Oct. 03, 2015 |
Jul. 04, 2015 |
Apr. 04, 2015 |
Dec. 31, 2016 |
Jan. 02, 2016 |
Jan. 03, 2015 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Net sales | $ 71,195 | $ 73,515 | $ 78,055 | $ 80,806 | $ 67,593 | $ 70,648 | $ 76,462 | $ 76,388 | $ 303,571 | $ 291,091 | $ 283,508 |
| Gross profit | 21,522 | 22,414 | 23,754 | 24,592 | 20,046 | 21,042 | 20,868 | 21,478 | 92,282 | 83,434 | 78,450 |
| Income (loss) from operations | (1,573) | (84) | 865 | 1,182 | (708) | (222) | (1,107) | (18) | 390 | (2,055) | (5,912) |
| Income (loss) before income taxes | (1,901) | (367) | 625 | 841 | (1,007) | (491) | (1,369) | (368) | (802) | (3,235) | (6,948) |
| Net income (loss) | (1,914) | (360) | 681 | 990 | (798) | (288) | (1,022) | (316) | (603) | (2,424) | (7,086) |
| Net loss attributable to noncontrolling interests | (561) | (258) | (253) | (262) | (344) | (296) | (247) | (256) | (1,334) | (1,143) | (207) |
| Net income (loss) attributable to U.S. Auto Parts | $ (1,353) | $ (102) | $ 934 | $ 1,252 | $ (454) | $ 8 | $ (775) | $ (60) | $ 731 | $ (1,281) | $ (6,879) |
| Basic net income (loss) per share as reported and adjusted(in dollars per share) | $ (0.04) | $ 0.00 | $ 0.03 | $ 0.03 | $ (0.01) | $ 0.00 | $ (0.02) | $ 0.00 | $ 0.01 | $ (0.04) | $ (0.21) |
| Diluted net income (loss) per share as reported and adjusted (in dollars per share) | $ (0.04) | $ 0.00 | $ 0.02 | $ 0.03 | $ (0.01) | $ 0.00 | $ (0.02) | $ 0.00 | $ 0.01 | $ (0.04) | $ (0.21) |
| Shares used in computation of basic net income (loss) per share as reported and adjusted (in shares) | 34,878 | 34,932 | 34,753 | 34,497 | 34,084 | 34,018 | 33,963 | 33,720 | 34,765 | 33,946 | 33,489 |
| Shares used in computation of diluted net income (loss) per share as reported and adjusted (in shares) | 34,878 | 34,932 | 40,007 | 39,359 | 34,084 | 34,018 | 33,963 | 33,720 | 36,207 | 33,946 | 33,489 |
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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