Annual report pursuant to Section 13 and 15(d)

Nature of Operations and Summary of Significant Accounting Policies - Summary of Revisions to Previously Reported Financial Information (Details)

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Nature of Operations and Summary of Significant Accounting Policies - Summary of Revisions to Previously Reported Financial Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended 9 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 15, 2020
Dec. 31, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE $ 1,704 $ 15,549 $ 17,224 $ 24,498 $ 24,859 $ 32,578 $ 33,555
Labor and related expenses 321 3,148 3,586 5,073 5,307 6,269 7,167
Total Operating Expenses 3,104 14,615 14,727 24,391 22,704 31,818 30,506
Other operating expenses 323     4,543   6,007 5,271
Restaurant Sales [Member]              
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE $ 1,350 11,782 11,683 18,451 17,164 $ 23,966 23,183
As Reported [Member]              
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE   15,864 17,518 24,939 25,336   34,227
Labor and related expenses   3,463 3,880 5,482 5,784   7,839
Total Operating Expenses   14,930 15,021 24,832 23,181   31,178
Other operating expenses       4,575      
As Reported [Member] | Restaurant Sales [Member]              
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE   12,097 11,977 18,892 17,641   23,855
Adjustment [Member]              
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE   (315) (294) (441) (477)   (672)
Labor and related expenses   (315) (294) (409) (477)   (672)
Total Operating Expenses   (315) (294) (441) (477)   (672)
Other operating expenses       (32)      
Adjustment [Member] | Restaurant Sales [Member]              
Error Corrections And Prior Period Adjustments Restatement [Line Items]              
TOTAL REVENUE   $ (315) $ (294) $ (441) $ (477)   $ (672)