Stockholder's Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	Mar. 13, 2017	Feb. 09, 2017	Feb. 08, 2017	Apr. 04, 2017	Apr. 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
L Catterton
Class of Stock [Line Items]
Net proceeds from issuance of private placement		$ 16.7
Transaction expenses		$ 1.8
Mill Road Capital II, L.P.
Class of Stock [Line Items]
Net proceeds from issuance of private placement				$ 31.3
Transaction expenses				0.2
Additional transaction expenses				2.1
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
Common stock, par value (USD per share)			$ 0.01
Price per share (in dollars per share)			$ 1,000
Discount on convertible preferred stock				$ 1.0
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
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