Capitalization - Activity In Stock Options (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 29, 2017	Jan. 28, 2017
Shares
Outstanding at the beginning of the period (in shares)	1,092,502
Granted (in shares)	36,000
Canceled/forfeited (in shares)	(61,333)
Outstanding at the end of the period (in shares)	1,067,169	1,092,502
Vested and Exercisable at the end of the period (in shares)	793,498
Weighted Average Price
Outstanding at the beginning of the period (in dollars per share)	$ 16.59
Granted (in dollars per share)	8.43
Canceled/forfeited (in dollars per share)	18.14
Outstanding at the end of the period (in dollars per share)	16.23	$ 16.59
Vested and Exercisable at the end of the period (in dollars per share)	$ 16.59
Weighted Average Remaining Contractual Term (in years)
Outstanding	3 years 3 months 26 days	3 years 7 months 28 days
Vested and Exercisable at the end of the period	2 years 10 months 21 days
Stock Options
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense (in dollars)	$ 1,041
Weighted average period for recognition of unrecognized stock-based compensation expense	1 year 6 months 7 days
Total fair value of vested options (in dollars)	$ 870