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Note 6 - Debt (Details Textual)
د.إ in Millions, ج.م. in Billions
12 Months Ended 16 Months Ended
Sep. 20, 2018
USD ($)
Jul. 28, 2016
USD ($)
Jul. 28, 2016
CAD ($)
Jun. 19, 2012
USD ($)
Jan. 31, 2020
USD ($)
Jan. 31, 2019
USD ($)
Jan. 31, 2020
USD ($)
Jan. 31, 2020
CAD ($)
Jan. 31, 2020
AED (د.إ)
Jan. 31, 2020
EGP (ج.م.)
Oct. 31, 2019
Jul. 31, 2019
Apr. 30, 2019
Sep. 19, 2018
USD ($)
Repayments of Lines of Credit         $ 72,973,000 $ 62,759,000                
Line of Credit, Current         8,577,000 8,890,000 $ 8,577,000              
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   $ 21,000 $ 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 (Year) 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, Term Two           2,462,000                
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term One                       1.1 1.1  
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term Two         1.1   1.1   1.1 1.1 1.1      
Line of Credit, Current         $ 8,577,000 8,890,000 $ 8,577,000              
Line of Credit Facility, Current Borrowing Capacity         $ 3,400,000   $ 3,400,000              
Revolving Lines, North America [Member] | Weighted Average [Member]                            
Line of Credit Facility, Interest Rate at Period End         6.04%   6.04%   6.04% 6.04%        
Letter of Credit [Member]                            
Repayments of Lines of Credit             $ 154,500              
Foreign Revolving Lines [Member]                            
Line of Credit Facility, Maximum Borrowing Capacity         $ 21,600,000   21,600,000              
Line of Credit, Current         691,000 $ 84,000 691,000              
Letters of Credit Outstanding, Amount         4,200,000   4,200,000              
Proceeds from Issuance of Debt         700,000                  
Line of Credit Facility, Remaining Borrowing Capacity         $ 16,800,000   16,800,000              
Foreign Revolving Lines [Member] | EIBOR [Member]                            
Debt Instrument, Basis Spread on Variable Rate         3.50%                  
Foreign Revolving Lines [Member] | CBE Corridor Rate [Member]                            
Debt Instrument, Basis Spread on Variable Rate         1.50%                  
Foreign Revolving Lines [Member] | Revolving Credit Line With 16.3% Interest Rate [Member]                            
Line of Credit Facility, Maximum Borrowing Capacity         $ 12,600,000   $ 12,600,000     ج.م. 0.2        
Line of Credit Facility, Interest Rate at Period End         16.30%   16.30%   16.30% 16.30%        
Foreign Revolving Lines [Member] | Revolving Credit Line With 6.15% Interest Rate [Member]                            
Line of Credit Facility, Maximum Borrowing Capacity         $ 2,200,000   $ 2,200,000   د.إ 8          
Line of Credit Facility, Interest Rate at Period End         5.40%   5.40%   5.40% 5.40%        
Foreign Revolving Lines [Member] | Revolving Credit Line With 6.51% Interest Rate [Member]                            
Line of Credit Facility, Maximum Borrowing Capacity         $ 6,800,000   $ 6,800,000   د.إ 25          
Line of Credit Facility, Interest Rate at Period End         5.90%   5.90%   5.90% 5.90%        
Foreign Revolving Lines [Member] | Weighted Average [Member]                            
Line of Credit Facility, Interest Rate at Period End         5.90%   5.90%   5.90% 5.90%        
Foreign Revolving Lines [Member] | Minimum [Member]                            
Line of Credit Facility, Interest Rate at Period End         5.40%   5.40%   5.40% 5.40%        
Debt Instrument, Interest Rate, Stated Percentage         4.50%   4.50%   4.50% 4.50%        
Foreign Revolving Lines [Member] | Maximum [Member]                            
Line of Credit Facility, Interest Rate at Period End         16.30%   16.30%   16.30% 16.30%