Summary of Significant Accounting Policies (Details 4) (USD $)	9 Months Ended
	Oct. 27, 2012
Stock Options
Shares
Outstanding at the beginning of the period (in shares)	973,833
Granted (in shares)	293,000
Exercised (in shares)	(5,500)
Canceled/forfeited (in shares)	(186,333)
Outstanding at the end of the period (in shares)	1,075,000
Vested and Exercisable at the end of the period (in shares)	458,831
Non-vested and not exercisable at the end of the period (in shares)	616,169
Weighted Average Price
Outstanding at the beginning of the period (in dollars per share)	$ 17.92
Granted (in dollars per share)	$ 11.75
Exercised (in dollars per share)	$ 13.06
Canceled/forfeited (in dollars per share)	$ 18.44
Outstanding at the end of the period (in dollars per share)	$ 16.37
Vested and Exercisable at the end of the period (in dollars per share)	$ 17.66
Non-vested and not exercisable at the end of the period (in dollars per share)	$ 15.42
Weighted Average Remaining Contractual Term (in years)
Outstanding	4 years 8 months 1 day
Vested and Exercisable at the end of the period	3 years 5 months 1 day
Non-vested and not exercisable at the end of the period	5 years 4 months 17 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 662,870
Non-vested and not exercisable at the end of the period (in dollars)	67,870
Vested and Exercisable at the end of the period (in dollars)	595,000
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense (in dollars)	1,969,929
Weighted average period for recognition of unrecognized stock-based compensation expense (in dollars)	2 years 7 months 24 days
Fair value
Total fair value of vested options (in dollars)	820,659
Restricted Stock Awards
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense (in dollars)	$ 91,127
Weighted average period for recognition of unrecognized stock-based compensation expense (in dollars)	2 years 7 months 24 days