Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Summary of activities for discontinued operations
Total revenues	$ 0	$ 399	$ 0	$ 1,627
Loss from discontinued operations	0	(56)	0	(279)
Gain on sales of aesthetics business, net	0	0	0	1,149
(Loss) income before provision for (benefit from) income taxes	0	(56)	0	870
Income tax (expense) benefit	0	(134)	0	749
(Loss) income from discontinued operations, net of tax	$ 0	$ (190)	$ 0	$ 1,619