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Detail of Certain Balance Sheet Accounts - Schedule of Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accrual for known contingencies $ 194 $ 472
Customer prepayments 78 37
Deferred rent 17 64
Current portion of capital leases 2 63
State income taxes payable 79 54
Insurance payable 370 378
Other current liabilities $ 740 $ 1,068