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Note 9 - Debt (Details Textual)
$ in Thousands, د.إ in Millions, ج.م. in Millions, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Apr. 14, 2021
USD ($)
Dec. 17, 2020
USD ($)
May 01, 2020
USD ($)
Sep. 20, 2018
USD ($)
Jul. 28, 2016
USD ($)
Jul. 28, 2016
CAD ($)
Jun. 19, 2012
USD ($)
Jun. 30, 2021
USD ($)
Apr. 30, 2021
USD ($)
Jan. 31, 2021
USD ($)
Jul. 31, 2020
Apr. 30, 2020
USD ($)
Apr. 30, 2021
USD ($)
Jul. 31, 2021
Oct. 31, 2020
Apr. 30, 2021
AED (د.إ)
Apr. 30, 2021
EGP (ج.م.)
Jan. 31, 2021
EGP (ج.م.)
Nov. 30, 2019
EGP (ج.م.)
Debt and Lease Obligation, Total                 $ 8,300 $ 13,200     $ 8,300            
Proceeds from Issuance of Long-term Debt, Total                 9,138                  
Line of Credit, Current                 2,826                
Finance Lease, Liability, Current                 262 300     262            
Finance Lease, Liability, Noncurrent                 350 401     350            
Repayments of Secured Debt                 892                  
Land and Buildings in Lebanon, Tennessee [Member]                                      
Lessee, Finance Lease, Term of Contract (Year) 15 years                                    
Lessee, Finance Lease, Annual Rent $ 800                                    
Lessee, Finance Lease, Annual Rent Increase, Percentage 2.00%                                    
Lessee, Finance Lease, Number of Options to Extend 4                                    
Lessee, Finance Lease, Renewal Term (Year) 5 years                                    
Lessee, Finance Lease, Discount Rate 8.00%                                    
Finance Lease, Liability, Current                 200       200            
Finance Lease, Liability, Noncurrent                 8,905     8,905            
Land and Buildings in Lebanon, Tennessee [Member]                                      
Disposal Group, Including Discontinued Operation, Consideration $ 10,400                                    
Proceeds from Sale of Property, Plant, and Equipment, Total 8,700                                    
Escrow Deposit 400                                    
Revolving Lines, North America [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity       $ 18,000                              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage       0.375%                              
Line of Credit Facility, Capital Expenditures Restrictions       $ 3,000                              
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term One       1.1                              
Line of Credit Facility, Covenant Terms, EBITDA Ratio, Term Two       1.1                              
Line of Credit Facility, Covenant, Fixed Charge Coverage Ratio                             1.1        
Repayments of Long-term Lines of Credit   $ 1,000                                  
Line of Credit Facility, Additional Fees to Be Incurred   100                                  
Line of Credit Facility, Maximum Borrowing Capacity, Availability Block   $ 2,000                                  
Line of Credit, Current                 0 2,800     0            
Line of Credit Facility, Current Borrowing Capacity                 7,600 $ 1,700     $ 7,600            
Revolving Lines, North America [Member] | The Company and Its Subsidiaries [Member]                                      
Line of Credit Facility, Fixed Charge Coverage Ratio Required                         1.25            
Revolving Lines, North America [Member] | The Company and Its Subsidiaries [Member] | Forecast [Member]                                      
Line of Credit Facility, Fixed Charge Coverage Ratio Required                           1.25          
Revolving Lines, North America [Member] | North American Loan Parties [Member]                                      
Line of Credit Facility, Fixed Charge Coverage Ratio Required                   1.1     1.1            
Line of Credit Facility, Cash Available to Satisfy a Future Potential Repatriation Cure of Ratio Covenant Breach                 6,000       $ 6,000            
Revolving Lines, North America [Member] | North American Loan Parties [Member] | Forecast [Member]                                      
Line of Credit Facility, Fixed Charge Coverage Ratio Required                           1.1          
Proceeds from Cash Repatriated from Subsidiary               $ 900                      
Foreign Revolving Lines [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity                 $ 5,800       $ 5,800            
Line of Credit Facility, Interest Rate at Period End                 5.13%       5.13%     5.13% 5.13%    
Letters of Credit Outstanding, Amount                 $ 5,300       $ 5,300            
Proceeds from Issuance of Debt                 2,000                    
Line of Credit Facility, Remaining Borrowing Capacity                 $ 5,800       $ 5,800            
Foreign Revolving Lines [Member] | Minimum [Member]                                      
Line of Credit Facility, Interest Rate at Period End                 3.50%       3.50%     3.50% 3.50%    
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                 8.00%       8.00%     8.00% 8.00%    
Foreign Revolving Lines [Member] | EIBOR [Member] | Minimum [Member]                                      
Debt Instrument, Basis Spread on Variable Rate                 3.00%                    
Foreign Revolving Lines [Member] | EIBOR [Member] | Maximum [Member]                                      
Debt Instrument, Basis Spread on Variable Rate                 3.50%                    
Paycheck Protection Program CARES Act [Member]                                      
Proceeds from Issuance of Long-term Debt, Total     $ 3,200                                
Percent of Proceeds from Issuance of Debt Used for Payroll Related Expenses                     100.00%                
Mortgage Note Secured by Tennessee Manufacturing Facility [Member]                                      
Repayments of Secured Debt $ 900                                    
Debt Instrument, Issuance Date             Jun. 19, 2012                        
Proceeds from Issuance of Secured Debt             $ 1,800                        
Revolving Credit Lines Used by Middle Eastern Subsidiaries, 1 [Member] | Foreign Revolving Lines [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity                 $ 2,200       $ 2,200     د.إ 8.0      
Line of Credit Facility, Interest Rate at Period End                 3.50%       3.50%     3.50% 3.50%    
Revolving Credit Lines Used by Middle Eastern Subsidiaries, 2 [Member] | Foreign Revolving Lines [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity                 $ 5,300       $ 5,300     د.إ 19.5      
Line of Credit Facility, Interest Rate at Period End                 4.50%       4.50%     4.50% 4.50%    
Revolving Credit Lines Used by Middle Eastern Subsidiaries, 3 [Member] | Foreign Revolving Lines [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity                 $ 12,700       $ 12,700       ج.م. 100.0   ج.م. 200.0
Revolving Credit Lines Used by Middle Eastern Subsidiaries, 4 [Member] | Foreign Revolving Lines [Member]                                      
Line of Credit Facility, Maximum Borrowing Capacity                 $ 2,900       $ 2,900         ج.م. 46.2  
Line of Credit Facility, Interest Rate at Period End                 8.00%       8.00%     8.00% 8.00%    
Canadian Mortgage Note [Member]                                      
Proceeds from Issuance of Debt         $ 6,100 $ 8                          
Debt Instrument, Maturity Date         Dec. 23, 2042 Dec. 23, 2042                          
Debt Instrument, Interest Rate, Effective Percentage                 4.55%       4.55%     4.55% 4.55%