Summary of Significant Accounting Policies - EPS, Advertising and Leases (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Advertising
Advertising expense									$ 2.5	$ 2.6	$ 2.4
Operating Leases
Liability for estimated expenses to be incurred upon the termination of entity's operating leases	$ 0.8				$ 0.8				$ 0.8	$ 0.8
Reconciliation of average number of common shares outstanding used to calculate basic and diluted earnings per share
Average number of common shares outstanding	14,680,129	14,676,990	14,675,712	14,594,180	14,651,403	15,056,014	15,182,838	15,095,729	14,656,753	14,996,496	14,960,920
Incremental shares from assumed exercises of stock options										193	1,254
Incremental shares from assumed vesting of nonvested restricted stock									5,519	58,849	58,315
Average number of common shares and common stock equivalents outstanding	14,693,008	14,676,990	14,675,712	14,603,377	14,722,551	15,114,572	15,203,692	15,181,337	14,662,272	15,055,538	15,020,489
Stock Options
Securities excluded from calculation of diluted earnings per share (in shares)									4,000	19,000	27,000
Restricted Stock
Securities excluded from calculation of diluted earnings per share (in shares)									237,000	332,000	542,000