Stockholder's Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended	6 Months Ended
	May 24, 2018	Mar. 13, 2017	Feb. 09, 2017	Feb. 08, 2017	Jul. 04, 2017	Jul. 04, 2017	Jul. 03, 2018	Jan. 02, 2018	Apr. 12, 2017
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)							0	0
Common stock, par value (USD per share)							$ 0.01	$ 0.01
Common Class A
Class of Stock [Line Items]
Common stock, par value (USD per share)	$ 0.01
Common Class B
Class of Stock [Line Items]
Common stock, par value (USD per share)	$ 0.01
Shares converted (in shares)	1,522,098
L Catterton
Class of Stock [Line Items]
Net proceeds from issuance of private placement			$ 16.6
Transaction expenses			$ 1.9
Mill Road Capital II, L.P.
Class of Stock [Line Items]
Net proceeds from issuance of private placement					$ 29.1
Transaction expenses					2.4
Mill Road Capital II, L.P. | Common Class A
Class of Stock [Line Items]
Common stock, shares, issued (in shares)		8,873,240
Fair Value, Inputs, Level 2 | L Catterton
Class of Stock [Line Items]
Fair value of warrants				$ 3.1
Embedded beneficiary conversion				$ 3.1
Common Stock | L Catterton | Common Class A
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)				4,252,873					4,252,873
Amortized discount					$ 7.0	$ 8.0
Common stock, par value (USD per share)				$ 0.01
Price per share (in dollars per share)				$ 1,000
Common Stock | Mill Road Capital II, L.P. | Common Class A
Class of Stock [Line Items]
Common stock, par value (USD per share)		$ 0.01
Price per share (in dollars per share)		$ 3.55
Preferred Stock | L Catterton
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				18,500	18,500	18,500
Proceeds from issuance of private placement				$ 18.5
Preferred Stock | Mill Road Capital II, L.P.
Class of Stock [Line Items]
Proceeds from issuance of private placement		$ 31.5
Common Stock | Warrant | L Catterton
Class of Stock [Line Items]
Number of securities called by each warrant or right (in shares)				1,913,793
Exercise price of warrants or rights (in USD per share)				$ 4.35