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Long-term Debt (Details)
$ in Thousands
9 Months Ended
May 29, 2018
USD ($)
Jan. 29, 2016
USD ($)
Dec. 30, 2015
USD ($)
Sep. 30, 2018
USD ($)
Tranche
Dec. 31, 2017
USD ($)
Long-term Debt [Abstract]          
Term note, net of debt discount and deferred financing cost       $ 7,362 $ 10,240
Less: current portion       0 (2,387)
Long-term debt       7,362 7,853
Term-Note Credit Facility [Member]          
Long-term Debt [Abstract]          
Unamortized discount on the long term debt       117 160
Deferred financing costs       92 $ 171
Maturities of Long-term Debt [Abstract]          
Remaining in 2018       0  
2019       252  
2020       3,029  
2021       3,029  
2022       1,261  
Total long-term debt       7,571  
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member]          
Long-term Debt [Abstract]          
Maximum borrowing capacity under the agreement       $ 12,000  
Number of tranches | Tranche       2  
Maturity date       Dec. 01, 2020  
Credit facility amount outstanding $ 10,600        
Period without debt principal payments due       18 months  
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member] | Maximum [Member]          
Long-term Debt [Abstract]          
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  
Debt instrument variable rate       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 $ (3,000)   $ (10,000)    
MidCap Financial Trust [Member] | Term-Note Credit Facility [Member] | Second Tranche [Member]          
Long-term Debt [Abstract]          
Proceeds from credit facility   $ 1,500