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Note 4 - Senior Credit Facility and Other Long Term Debt (Details Textual) - USD ($)
$ in Thousands
6 Months Ended
May 15, 2019
Dec. 22, 2017
Dec. 31, 2019
Jun. 30, 2019
Capital Lease Obligations, Total     $ 154 $ 269
First American Equipment Finance [Member]        
Capital Lease Obligations, Total   $ 143    
Sale Leaseback Transaction, Monthly Rental Payments   $ 6    
Sale Leaseback Transaction, Imputed Interest Rate   6.56%    
Amended Loan Agreement [Member]        
Senior Notes, Total $ 11,585      
Debt Instrument, Debt Default, Interest Rate Basic Spread 2.00%      
Line of Credit Facility Covenant Prepayment Provisions Percentage of Excess Cash flow     25.00%  
Amended Loan Agreement [Member] | Term Loan [Member]        
Debt Instrument, Face Amount $ 3,585      
Loans Payable, Noncurrent, Total     $ 2,852 3,455
Number of Consecutive Monthly Installments 84      
Number of Consecutive Monthly Installments, Fixed Amount 83      
Debt Instrument, Periodic Payment, Total $ 43      
Line of Credit Facility Covenant Prepayment Provisions Percentage of Excess Cash flow 25.00%      
Amended Loan Agreement [Member] | Term Loan [Member] | Eurodollar [Member]        
Debt Instrument, Basis Spread on Variable Rate 3.00%      
Amended Loan Agreement [Member] | Term Loan [Member] | Base Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate     3.00%  
Amended Loan Agreement [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 8,000      
Long-term Line of Credit, Total     $ 4,500 $ 4,250
Line of Credit Facility Covenant Maximum Aggregate Revolving Advance $ 8,000,000      
Line of Credit Facility Covenant Aggregate Revolving Advance Receivables Advance Rate 85.00%      
Line of Credit Facility Covenant Aggregate Revolving Advance Inventory Advance Rate 75.00%      
Line of Credit Facility, Covenan,t Aggregate Revolving Advance, Appraised Liquidation Value, Inventory Advance Rate 85.00%      
Amended Loan Agreement [Member] | Revolving Credit Facility [Member] | Eurodollar [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.50%      
Amended Loan Agreement [Member] | Revolving Credit Facility [Member] | Base Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate     2.50%