Income Taxes (Details 2)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Company's effective tax rate differs from the statutory federal income tax rate
Income tax provision at statutory rate	34.00%	34.00%	34.00%
State income taxes, net of federal benefit	(13.30%)	(88.10%)	(2.00%)
Permanent differences	(17.00%)	(89.10%)	0.00%
Research and development credits	0.00%	0.00%	(3.80%)
Change in valuation allowance	(2.30%)	180.30%	(15.80%)
Effective tax rate	1.40%	37.10%	12.40%