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Long-term Debt (Details)
$ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
May 29, 2018
USD ($)
Jan. 29, 2016
USD ($)
Dec. 30, 2015
USD ($)
May 28, 2018
Dec. 31, 2018
USD ($)
Tranche
Dec. 31, 2018
USD ($)
Tranche
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Long-term Debt [Abstract]                          
Less: current portion         $ (252) $ (252)   $ 0 $ (3,410) $ (2,387) $ (1,936) $ (3,429) $ (2,571)
Total long-term debt         7,145 7,145 $ 7,362 $ 7,321 $ 6,869 7,853 $ 8,842 $ 8,150 $ 8,948
Term-Note Credit Facility [Member]                          
Long-term Debt [Abstract]                          
Term note, net of debt discount and deferred financing cost         7,397 7,397       10,240      
Less: current portion         (252) (252)       (2,387)      
Total long-term debt         7,145 7,145       7,853      
Unamortized discount on the long term debt         110 110       160      
Deferred financing costs         64 64       $ 171      
Maturities of Long-term Debt [Abstract]                          
2019         252 252              
2020         3,028 3,028              
2021         3,028 3,028              
2022         1,263 1,263              
Total long-term debt         7,571 7,571              
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member]                          
Long-term Debt [Abstract]                          
Maximum borrowing capacity under the agreement         $ 12,000 $ 12,000              
Number of tranches | Tranche         2 2              
Repayment of debt $ (3,000)                        
Maturity date           May 31, 2022              
Interest rate on credit facility         9.60% 9.60%       9.48%      
Credit facility amount outstanding $ 10,571                        
Period without debt principal payments due           18 months              
Monthly payment, principal           $ 252              
Percentage of change in cash flows, due to debt modifications 10.00%                        
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member] | LIBOR [Member]                          
Long-term Debt [Abstract]                          
Debt instrument term of variable rate       1 month 1 month                
Debt instrument variable rate       8.25% 7.25%                
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member] | First Tranche [Member]                          
Long-term Debt [Abstract]                          
Proceeds from credit facility     $ 10,500                    
Repayment of debt     $ (10,000)                    
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member] | Second Tranche [Member]                          
Long-term Debt [Abstract]                          
Proceeds from credit facility   $ 1,500