Post-effective amendment to a registration statement that is not immediately effective upon filing

Nature of Operations and Summary of Significant Accounting Policies - Summary of Store activity (Details)

v3.21.2
Nature of Operations and Summary of Significant Accounting Policies - Summary of Store activity (Details) - Store
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Stores, end of the period   116 116    
Franchised Stores [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Stores, beginning of the period 117 97 102 117 109
Stores opened during the year 9       15
Stores transferred/sold to the Company (2)     (2) 0
Stores closed during the period (22) (4) (12) (22) (7)
Stores, end of the period 102 93 93 102 117
Company-owned Stores [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Stores, beginning of the period 13   17 13 11
Stores opened during the year 2       3
Stores transferred/sold to the Company 2       0
Stores closed during the period         (1)
Stores, end of the period 17     17 13