Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Total
Balance at Jan. 02, 2009	$ 90,420	$ (12,021)	$ 78,399
Balance, shares at Jan. 02, 2009	21,287,700
Issuance of restricted common stock
Issuance of restricted common stock, shares	60,000
Issuance under employee stock plans	101		101
Issuance under employee stock plans, shares	136,478
Amortization of stock-based compensation	2,705		2,705
Net income (loss)		(20,026)	(20,026)
Balance at Jan. 01, 2010	93,226	(32,047)	61,179
Balance, shares at Jan. 01, 2010	21,484,178
Issuance of restricted common stock, shares	30,000
Issuance under employee stock plans	1,795		1,795
Issuance under employee stock plans, shares	785,804
Amortization of stock-based compensation	3,196		3,196
Excess tax benefit from stock-based compensation	1,242		1,242
Net income (loss)		20,097	20,097
Balance at Dec. 31, 2010	99,459	(11,950)	87,509
Balance, shares at Dec. 31, 2010	22,299,982
Issuance of restricted common stock, shares	37,500
Issuance under employee stock plans	1,011		1,011
Issuance under employee stock plans, shares	573,167
Amortization of stock-based compensation	4,359		4,359
Excess tax benefit from stock-based compensation	672		672
Net income (loss)		23,734	23,734
Balance at Dec. 30, 2011	$ 105,501	$ 11,784	$ 117,285
Balance, shares at Dec. 30, 2011	22,910,649