Summary of Significant Accounting Policies - Stock Based Compensation Section 2 (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2016	Jan. 30, 2016
Shares
Outstanding at the beginning of the period (in shares)	1,113,003
Outstanding at the end of the period (in shares)	1,113,003	1,113,003
Vested and Exercisable at the end of the period (in shares)	640,826
Weighted Average Price
Outstanding at the beginning of the period (in dollars per share)	$ 17.50
Outstanding at the end of the period (in dollars per share)	17.50	$ 17.50
Vested and Exercisable at the end of the period (in dollars per share)	$ 15.58
Weighted Average Remaining Contractual Term (in years)
Outstanding	3 years 9 months 22 days	4 years 22 days
Vested and Exercisable at the end of the period	2 years 5 months 9 days
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)	$ 1,339
Outstanding at the end of the period (in dollars)	1,074	$ 1,339
Vested and Exercisable at the end of the period (in dollars)	790
Unrecognized stock-based compensation
Unrecognized stock-based compensation expense (in dollars)	$ 1,741
Weighted average period for recognition of unrecognized stock-based compensation expense	1 year 11 months 5 days
Total fair value of vested options (in dollars)	$ 319