Shareholders' Equity Shareholders' Equity - Stock Option Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2015
Number of Shares
Granted (shares)	920,000
Stock Options
Number of Shares
Outstanding as of January 28, 2012 (shares)	1,208,275
Granted (shares)	135,000	[1]
Exercised (shares)	(107,592)
Forfeited (shares)	(5,430)
Outstanding as of February 2, 2013 (shares)	1,230,253
Vested and expected to vest as of February 2, 2013 (shares)	1,138,584
Exercisable as of February 2, 2013 (shares)	1,138,584
Weighted Average Exercise Price
Outstanding as of January 28, 2012 (usd per share)	8.32
Granted (usd per share)	5.68	[1]
Exercised (usd per share)	3.68
Forfeited (usd per share)	8.90
Outstanding as of February 2, 2013 (usd per share)	8.43
Vested as of February 2, 2013 (usd per share)	8.36
Exercisable as of February 2, 2013 (usd per share)	8.36
Weighted Average Remaining Contractual Life
Outstanding as of January 31, 2015	6 years 1 month 6 days
Vested and expected to vest as of January 31, 2015	6 years
Exercisable as of January 31, 2015	6 years
Aggregate Intrinsic Value
Outstanding as of January 31, 2015	212
Vested and expected to vest as of January 31, 2015	212
Exercisable as of January 31, 2015	212

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