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Note 9 - Debt (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Dec. 27, 2018
Oct. 27, 2017
Mar. 31, 2020
Dec. 31, 2019
Nov. 20, 2019
Aug. 26, 2019
Short-term Debt, Total     $ 32,387 $ 26,491    
Non-recourse Factoring [Member]            
Long-term Debt, Gross     12,800      
Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity     40,000      
Line of Credit Facility, Additional Borrowing Capacity     60,000      
Line of Credit Facility, Incremental Borrowing Amount     $ 5,000      
Line of Credit Facility, Borrowing Base, Accounts Receivable Percentage     90.00%      
Long-term Line of Credit, Total     $ 21,930      
Line of Credit Facility, Remaining Borrowing Capacity     13,400      
Loans Payable [Member]            
Debt Instrument, Face Amount   $ 140,000        
Debt Instrument, Term (Year)   5 years        
Debt Issuance Costs, Net, Total   $ 7,300 $ 3,700      
Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.50%        
Secured Debt [Member]            
Debt Instrument, Face Amount $ 2,060          
Debt Instrument, Interest Rate, Stated Percentage 7.57%          
Debt Instrument, Convertible, Remaining Discount Amortization Period (Year) 2 years 6 months          
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Basis Spread on Variable Rate     1.50%      
Minimum [Member] | Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   3.75%        
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Basis Spread on Variable Rate     1.75%      
Maximum [Member] | Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.50%        
Line of Credit [Member]            
Line of Credit Facility, Maximum Borrowing Capacity     $ 30,000      
Short-term Debt, Total     $ 29,000      
Line of Credit [Member] | Minimum [Member]            
Debt Instrument, Basis Spread on Variable Rate     3.00%      
Line of Credit [Member] | Maximum [Member]            
Debt Instrument, Basis Spread on Variable Rate     4.50%      
Loans from Related Parties [Member] | Tribus Capital Limited [Member]            
Debt Instrument, Face Amount           $ 1,500
Debt Instrument, Interest Rate, Stated Percentage           8.50%
Interest Payable     $ 80      
Loans from Related Parties [Member] | Bluemoss Ergon Limited [Member]            
Debt Instrument, Face Amount         $ 1,750  
Debt Instrument, Interest Rate, Stated Percentage         8.50%  
Interest Payable     $ 50