Summary of Significant Accounting Policies (Details 4) (USD $)	6 Months Ended
	Jul. 28, 2012
Stock Options
Shares
Outstanding at the beginning of the period (in shares)	973,833
Granted (in shares)	293,000
Canceled/forfeited (in shares)	(163,334)
Outstanding at the end of the period (in shares)	1,103,499
Vested and Exercisable at the end of the period (in shares)	445,663
Non-vested and not exercisable at the end of the period (in shares)	657,836
Weighted Average Price
Outstanding at the beginning of the period (in dollars per share)	$ 17.92
Granted (in dollars per share)	$ 11.75
Canceled/forfeited (in dollars per share)	$ 19.23
Outstanding at the end of the period (in dollars per share)	$ 16.28
Vested and Exercisable at the end of the period (in dollars per share)	$ 17.68
Non-vested and not exercisable at the end of the period (in dollars per share)	$ 15.35
Weighted Average Remaining Contractual Term (in years)
Outstanding	4 years 11 months 8 days
Vested and Exercisable at the end of the period	3 years 1 month 10 days
Non-vested and not exercisable at the end of the period	5 years 7 months 24 days
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 577,600
Non-vested and not exercisable at the end of the period	543,500
Vested and Exercisable at the end of the period	34,100
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense	2,209,602
Weighted average period for recognition of unrecognized stock-based compensation expense	2 years 9 months 18 days
Fair value
Total fair value of vested options	694,527
Restricted Stock Awards
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense	$ 97,150
Weighted average period for recognition of unrecognized stock-based compensation expense	2 years 10 months 24 days