Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Jan. 03, 2009
Current: [Abstract]
Federal	$ 23,481,000	$ 15,812,000	$ (2,763,000)
State	3,622,000	758,000	103,000
Total Current	27,103,000	16,570,000	(2,660,000)
Deferred: [Abstract]
Federal	2,434,000	564,000	(16,231,000)
State	405,000	1,788,000	(1,971,000)
Total Deferred	2,839,000	2,352,000	(18,202,000)
Income tax expense (benefit)	29,942,000	18,922,000	(20,862,000)
Income Tax Expense (Benefit) Reconciliation to Statutory Rate [Abstract]
Statutory federal income tax (in hundredths)	35.00%	35.00%	35.00%
State income taxes, net of federal benefit (in hundredths)	3.20%	2.90%	4.70%
Manufacturing deduction (in hundredths)	(2.90%)	(2.70%)	0.00%
Changes in unrecognized tax benefits (in hundredths)	(0.80%)	1.80%	5.00%
Change in valuation allowance (in hundredths)	0.00%	0.00%	(182.70%)
Other (in hundredths)	(1.40%)	0.50%	(4.00%)
Effective tax rate (in hundredths)	33.10%	37.50%	(142.00%)
Current: [Abstract]
Compensation and benefits	1,175,000	1,254,000
Warranty and returns liabilities	2,492,000	1,584,000
Deferred rent and lease incentives	862,000	911,000
Other	107,000	570,000
Long-term: [Abstract]
Property and equipment	1,119,000	3,541,000
Stock-based compensation	6,380,000	5,964,000
Deferred rent and lease incentives	2,411,000	2,416,000
Warranty liability	1,047,000	1,419,000
Net operating loss and capital loss carryforwards	2,090,000	2,773,000
Other	417,000	469,000
Total gross deferred tax assets	18,100,000	20,901,000
Valuation allowance	(693,000)	(639,000)
Total net deferred tax assets	17,407,000	20,262,000
State income tax net operating loss carryforwards expiring between 2012 and 2032	28,400,000
Valuation allowance				26,800,000
Reconciliation of Unrecognized Tax Benefits (Excluding Interest and Penalties), Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	1,354,000	1,375,000	152,000
Increases related to prior-year tax positions	355,000	621,000	243,000
Decreases related to prior-year tax positions	0	(572,000)	0
Settlements with taxing authorities	(1,506,000)	(138,000)	0
Lapse of statute of limitation	(70,000)	0	0
Increases related to current-year tax positions	292,000	68,000	980,000
Ending Balance	425,000	1,354,000	1,375,000
Penalties and interest included in to income tax expense	(221,000)	247,000	78,000
Accrued interest and penalties related to unrecognized tax benefits	72,000	292,000
Unrecognized tax benefits that, if recognized, would impact the effective tax rate	$ 500,000	$ 1,600,000