Stock-Based Compensation - Additional Information (Detail) - USD ($)			1 Months Ended		12 Months Ended
	Jan. 01, 2017	Jun. 04, 2013	Jan. 28, 2017	Jun. 30, 2016	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015	Jul. 31, 2002
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense					$ 3,194,000	$ 3,773,000	$ 2,772,000
Options to purchase outstanding common stock			1,191,568		1,191,568	1,055,568
Restricted stock units outstanding			244,654		244,654	225,885
Shares reserved for future stock-based grants			873,243		873,243
Maximum contractual terms		10 years
Cash dividends paid on common stock					$ 0	$ 25,951,000	0
Restricted stock units granted					132,500
Restricted stock units, fair value grant prices per share					$ 13.49
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense					$ 1,700,000	$ 2,000,000	$ 1,300,000
Options exercise prices, Lower limit					$ 13.38
Options exercise prices, Upper limit					$ 25.52
Options issued to employees, Vested term					4 years
Expected period to recognize unvested stock options as stock compensation expense					1 year 4 months 24 days
Restricted Stock Units Granted to Directors and Vested on First Anniversary of Grant Date					100.00%
Percentage of Restricted Stock Units Granted to Employees vested on Third Anniversary of Grant date						100.00%
Restricted stock units granted					132,500	107,000	97,000
Restricted stock units, fair value grant prices per share					$ 13.49	$ 25.52	$ 18.46
Unrecognized compensation expense related to RSUs			$ 2,000,000		$ 2,000,000
Options issued to employees, vesting percentage					25.00%
In Money Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options to purchase outstanding common stock			609,194		609,194
Intrinsic value of in-the-money options outstanding			$ 2,200,000		$ 2,200,000
Aggregate Intrinsic value options exercisable			2,200,000		$ 2,200,000
Weighted average grant, fair values of options granted					$ 6.48	$ 12.06	$ 9.68
Intrinsic value of options exercised					$ 300,000	$ 6,100,000	$ 200,000
Unrecognized stock compensation expense			$ 2,800,000		$ 2,800,000
Expected period to recognize unvested stock options as stock compensation expense			2 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares of common stock award			660,000		660,000			500,000
Payroll deduction of the fair market value					85.00%
Shares of common stock issued					31,879	19,423	19,062
Shares remaining under the original authorization					141,290
Number of additional shares authorized	35,000			125,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares of common stock award		3,500,000
Options exercise prices, Upper limit					$ 25.52
Options issued to employees, Vested term		4 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercise prices, Lower limit					$ 1.11
Options issued to employees, Vested term		3 years
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation accelerated expense					$ 600,000