Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Numerator:
Net income	$ (873)	$ 1,546	$ 3,225	$ 7,048
Denominator:
Denominator for net income per common share — weighted average shares	8,713	8,713	8,719	8,659
Effect of dilutive securities:
Stock options (in shares)		178	40	217
Denominator for net income per common share, assuming dilution:
Adjusted weighted average shares and assumed exercises	8,713	8,891	8,759	8,876
Anti-dilutive shares
Number of anti-dilutive shares	1,020	335	720	198