Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Feb. 02, 2018	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Subsequent Event [Line Items]
Net proceeds from the offering		$ 1,816	$ 602	$ 2,411
Underwriter Public Offering [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, shares issued	4,761,905
Net proceeds from the offering	$ 94,500