INCOME TAXES (Details) (USD $)	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010	Jan. 31, 2009
Federal:
Current	$ 30,529,000	$ 24,924,000	$ 19,686,000
Deferred	26,000	(1,136,000)	(1,741,000)
Total federal	30,555,000	23,788,000	17,945,000
State:
Current	3,820,000	3,572,000	2,366,000
Deferred	(121,000)	(318,000)	(510,000)
Total state	3,699,000	3,254,000	1,856,000
Total tax provison	34,254,000	27,042,000	19,801,000
Reconciliation of federal statutory tax rate to effective tax rate
Tax provision computed at the federal statutory rate	35.00%	35.00%	35.00%
Effect of state income taxes, net of federal benefits	2.61%	2.48%	2.31%
Other, net	(0.90%)	(0.66%)	0.52%
Tax provision at effective rate	36.71%	36.82%	37.83%
Reconciliation of unrecognized tax benefit [Roll Forward]
Unrecognized tax benefit - beginning of year				2,501,000
Gross increases - tax positions in prior period	31,000	264,000	105,000
Gross decreases - tax positions in prior period	(1,412,000)	0	0
Gross increases - tax positions in current period	496,000	2,191,000	259,000
Settlements	(230,000)	0	0
Lapse of statute of limitations	(168,000)	(919,000)	(514,000)
Unrecognized tax benefit - end of year	2,604,000	3,887,000	2,351,000	2,501,000
Accrued interest and penalties related to unrecognized tax benefits	300,000	300,000	400,000
Unrecognized tax benefits that would affect effective income tax rate	1,100,000	1,200,000	1,000,000
Current [Member]
Deferred tax assets and liabilities, net
Deferred rent	1,458,000	1,620,000
Inventories	3,994,000	3,744,000
Accruals	2,593,000	2,421,000
Stock-based compensation	989,000	867,000
Other	20,000	19,000
Total deferred tax assets	9,054,000	8,671,000
Accumulated depreciation and amortization	0	0
Prepaid expenses	805,000	715,000
Accruals	72,000	71,000
Other	375,000	357,000
Total deferred tax liabilities	(1,252,000)	(1,143,000)
Deferred income taxes, net	7,802,000	7,528,000
Non-current [Member]
Deferred tax assets and liabilities, net
Deferred rent	4,664,000	5,166,000
Inventories	0	0
Accruals	1,433,000	1,069,000
Stock-based compensation	4,125,000	3,541,000
Other	2,000	6,000
Total deferred tax assets	10,224,000	9,782,000
Accumulated depreciation and amortization	6,682,000	6,048,000
Prepaid expenses	0	0
Accruals	0	0
Other	126,000	138,000
Total deferred tax liabilities	(6,808,000)	(6,186,000)
Deferred income taxes, net	$ 3,416,000	$ 3,596,000