Note 17. Equity Incentive Plans and Employee Benefits (Detail) - Black-Scholes Option Valuation Model Assumptions (USD $)	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Weighted average fair value at grant date (in Dollars per share)	$ 2.77	$ 5.26	$ 5.95
Stock Options [Member]
Expected volatility	51.31%	52.01%	55.02%
Risk-free interest rate	0.92%	1.60%	2.54%
Expected term (in years)	5 years 317 days	5 years 343 days	5 years 343 days
Dividend yield	0.00%	0.00%	0.00%
Weighted average fair value at grant date (in Dollars per share)	$ 2.77	$ 5.27	$ 5.95
Employee Stock Purchase Plan [Member]
Expected volatility	37.84%	46.03%	37.52%
Risk-free interest rate	0.13%	0.08%	0.21%
Expected term (in years)	178 days	178 days	6 months
Dividend yield	0.00%	0.00%	0.00%
Weighted average fair value at grant date (in Dollars per share)	$ 1.47	$ 1.85	$ 2.94