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Concentrations of Risk (Details) | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016
Top customer concentration risk [Member] | Sales revenue, net [Member] | Any single customer [Member] | Maximum [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage (as a percent) | 1.20% | 1.20%
Supplier concentration risk [Member] | Purchases [Member] | Top ten health care distribution suppliers [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage (as a percent) | 34.00% | 34.00%
Supplier concentration risk [Member] | Purchases [Member] | Single largest supplier [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage (as a percent) | 5.00% | 6.00%

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