|
Business Segments and Significant Customers (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 27, 2014
|
Sep. 27, 2014
|
Jun. 28, 2014
|
Mar. 29, 2014
|
Dec. 28, 2013
|
Sep. 28, 2013
|
Jun. 29, 2013
|
Mar. 30, 2013
|
Dec. 29, 2012
|
Sep. 29, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 27, 2014
|
Dec. 28, 2013
|
Dec. 29, 2012
|
|
| Business segments and significant customers | |||||||||||||||
| Total net revenue | $ 73,746 | $ 72,556 | $ 71,852 | $ 67,509 | $ 58,852 | $ 54,514 | $ 53,667 | $ 48,537 | $ 43,542 | $ 46,601 | $ 48,016 | $ 47,020 | $ 285,663 | $ 215,580 | $ 185,179 |
| Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Costco [Member] | |||||||||||||||
| Business segments and significant customers | |||||||||||||||
| Total net revenue | $ 75,300 | $ 74,500 | $ 64,600 | ||||||||||||
| Concentration risk (as a percent) | 26.00% | 35.00% | 35.00% | ||||||||||||