Supplemental Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 1,926	$ 3,503
Insurance receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	0	744
Vendor rebate receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	551	788
Franchise and other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 1,375	$ 1,971