Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Results of Operations, Income before Income Taxes [Abstract]
Domestic	$ 6,293	$ 51,859	$ 42,619
Foreign	20,193	(60,720)	104
Income (loss) before income taxes	26,486	(8,861)	42,723
Current:
Federal	251	(344)	13,463
State	(527)	36	(137)
Foreign	1,616	1,498	541
Current income tax (provision) benefit	1,340	1,190	13,867
Deferred:
Federal	2,549	18,000	(45,423)
State	342	1,487	(3,894)
Foreign	(66)	68	(59)
Deferred income tax (provision) benefit	2,825	19,555	(49,376)
Provision (benefit) for income taxes	$ 4,165	$ 20,745	$ (35,509)
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory federal rate	35.00%	35.00%	35.00%
State taxes, net	2.00%	(2.00%)	2.00%
Intellectual property sale	0.00%	0.00%	144.00%
Research and development credits	(11.00%)	(1.00%)	(3.00%)
Stock compensation	3.00%	(3.00%)	1.00%
Foreign rate differential	(20.00%)	(252.00%)	2.00%
Foreign dividends	0.00%	3.00%	1.00%
Capital loss expiration	2.00%	0.00%	0.00%
Valuation allowance	6.00%	(19.00%)	(289.00%)
Change in uncertain tax benefit accrual	(1.00%)	3.00%	31.00%
Tax rate change	(1.00%)	0.00%	(7.00%)
Other	1.00%	2.00%	0.00%
Effective income tax rate	16.00%	(234.00%)	(83.00%)