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Note 9 - Debt (Details Textual)
1 Months Ended 6 Months Ended 10 Months Ended
Jul. 28, 2016
USD ($)
Jul. 28, 2016
CAD ($)
Jun. 19, 2012
USD ($)
Oct. 31, 2018
Jul. 31, 2019
USD ($)
Jul. 31, 2018
USD ($)
Jul. 31, 2019
USD ($)
Jul. 31, 2019
CAD ($)
Apr. 30, 2019
Jan. 31, 2019
USD ($)
Sep. 20, 2018
USD ($)
Sep. 19, 2018
USD ($)
Debt and Lease Obligation, Total         $ 14,700,000   $ 14,700,000     $ 16,300,000    
Debt Instrument, Increase (Decrease), Net, Total         (1,600,000)              
Repayments of Lines of Credit         41,912,000 $ 17,618,000            
Line of Credit, Current         6,776,000   6,776,000     $ 8,890,000    
Canadian Mortgage Note [Member]                        
Proceeds from Issuance of Debt $ 6,100,000 $ 8,000,000                    
Debt Instrument, Maturity Date Dec. 23, 2042 Dec. 23, 2042                    
Debt Instrument, Interest Rate, Effective Percentage 6.05% 6.05%                    
Debt Instrument, Periodic Payment, Interest $ 28,000 $ 37,000                    
Debt Instrument, Periodic Payment, Principal $ 20,000 $ 27,000                    
Mortgage Note Secured by Tennessee Manufacturing Facility [Member]                        
Debt Instrument, Interest Rate, Stated Percentage     4.50%                  
Debt Instrument, Maturity Date     Jul. 01, 2027                  
Debt Instrument, Issuance Date     Jun. 19, 2012                  
Proceeds from Issuance of Secured Debt     $ 1,800,000                  
Debt Instrument, Periodic Payment, Total     $ 13,000                  
Debt Instrument, Adjustable Interest Rate Period, Commencement Date     Jun. 19, 2022                  
Debt Instrument, Interest Rate, Maximum Annual Increase     2.00%                  
Debt Instrument, Adjustable Interest Rate, Ceiling     18.00%                  
Debt Instrument, Adjustable Interest Rate, Floor     4.50%                  
Revolving Lines, North America [Member]                        
Debt Instrument, Term       3 years                
Line of Credit Facility, Maximum Borrowing Capacity                     $ 18,000,000 $ 15,000,000
Repayments of Lines of Credit             $ 3,773,823 $ 4,794,528        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage             0.375% 0.375%        
Line of Credit Facility, Capital Expenditures Restrictions         3,000,000   $ 3,000,000          
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term One                 1.1      
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term Two                   1.1    
Debt Instrument, Interest Rate, Stated Percentage                     2.00%  
Line of Credit, Current         6,800,000   6,800,000          
Line of Credit Facility, Current Borrowing Capacity         $ 7,100,000   $ 7,100,000          
Revolving Lines, North America [Member] | Weighted Average [Member]                        
Line of Credit Facility, Interest Rate at Period End         6.20%   6.20%          
Revolving Lines, North America [Member] | Intersest Rate 1 [Member]                        
Line of Credit Facility, Interest Rate at Period End         8.50%   8.50%          
Revolving Lines, North America [Member] | Interest Rate 2 [Member]                        
Line of Credit Facility, Interest Rate at Period End         6.24%   6.24%          
Revolving Lines, North America [Member] | Interest Rate 3 [Member]                        
Line of Credit Facility, Interest Rate at Period End         6.36%   6.36%          
Letter of Credit [Member]                        
Repayments of Lines of Credit             $ 154,500          
Foreign Revolving Lines [Member]                        
Line of Credit Facility, Maximum Borrowing Capacity         $ 9,000,000   9,000,000          
Letters of Credit Outstanding, Amount         6,400,000   6,400,000          
Proceeds from Issuance of Debt         900,000              
Line of Credit Facility, Remaining Borrowing Capacity         $ 1,700,000   $ 1,700,000          
Foreign Revolving Lines [Member] | EIBOR [Member]                        
Debt Instrument, Basis Spread on Variable Rate         3.50%              
Foreign Revolving Lines [Member] | Weighted Average [Member]                        
Line of Credit Facility, Interest Rate at Period End         5.91%   5.91%          
Foreign Revolving Lines [Member] | Minimum [Member]                        
Debt Instrument, Interest Rate, Stated Percentage         4.50%   4.50%          
Line of Credit Facility, Interest Rate at Period End         5.70%   5.70%          
Foreign Revolving Lines [Member] | Maximum [Member]                        
Line of Credit Facility, Interest Rate at Period End         6.20%   6.20%