Capitalization - Common Stock Settlement and Issuance (Details) - USD ($) $ in Millions			12 Months Ended
	Dec. 29, 2017	Jun. 26, 2017	Dec. 31, 2017
Public Offering
Shares issued (in shares)		4,111,250
General and Administrative Expense			$ 11.6
Common Stock
Public Offering
Shares issued (in shares)			14,000
Shares to be issued per settlement agreement	105,237