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Long-term Debt (Details)
$ in Thousands
6 Months Ended
May 29, 2018
USD ($)
Jan. 29, 2016
USD ($)
Dec. 30, 2015
USD ($)
Jun. 30, 2019
USD ($)
Tranche
Dec. 31, 2018
USD ($)
Long-term Debt [Abstract]          
Less: current portion       $ (1,767) $ (252)
Total long-term debt       5,699 7,145
Term-Note Credit Facility [Member]          
Long-term Debt [Abstract]          
Term note, net of debt discount and deferred financing cost       7,466 7,397
Less: current portion       (1,767) (252)
Total long-term debt       5,699 7,145
Unamortized discount on the long term debt       98 110
Deferred financing costs       7 64
Maturities of Long-term Debt [Abstract]          
Remaining in 2019         252
2020         3,028
2021         3,028
2022         1,263
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  
Repayment of debt $ (3,000)        
Maturity date       May 31, 2022  
Credit facility amount outstanding $ 10,571        
Period without debt principal payments due       18 months  
Monthly payment, principal       $ 252  
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