Stock Split, Authorization of Additional Shares, and Initial Public Offering - Additional Information (Detail) $ / shares in Units, $ in Millions			12 Months Ended
	Jul. 30, 2014 USD ($) $ / shares shares	Jul. 14, 2014 $ / shares shares	Dec. 28, 2016 $ / shares shares	Dec. 30, 2015 $ / shares shares	Jul. 24, 2014 $ / shares shares
Shareholders Equity [Line Items]
Common stock , authorized		200,000,000	200,000,000	200,000,000	200,000,000
Common stock, par value | $ / shares		$ 0.01	$ 0.01	$ 0.01	$ 0.01
Stock split note			8.56381-for-1
Stock split ratio		8.56381
Increase in authorized shares					300,000,000
Preferred stock, authorized			100,000,000	100,000,000	100,000,000
Preferred stock, par value | $ / shares			$ 0.01	$ 0.01	$ 0.01
Senior Secured Term Loan [Member]
Shareholders Equity [Line Items]
Repayment of debt | $	$ 100.0
IPO [Member]
Shareholders Equity [Line Items]
Shares issued in in initial public offering	8,214,286
Shares issued, price per share | $ / shares	$ 15.00
Net proceeds from initial public offering | $	$ 112.3
Underwriters [Member]
Shareholders Equity [Line Items]
Shares issued in in initial public offering	1,071,429