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Operations Optimization Costs (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 25, 2018
Apr. 30, 2020
May 31, 2020
Feb. 29, 2020
Nov. 30, 2019
May 31, 2019
Nov. 30, 2018
Aug. 31, 2018
May 31, 2020
Feb. 29, 2020
Aug. 31, 2019
May 31, 2020
Aug. 31, 2019
May 31, 2019
Operations Optimization Costs                            
Percentage of targeted reduction of our global workforce     4.50%                      
Severance costs     $ 183                 $ 183    
Exit costs related to facilities     268     $ 193           977   $ 453
Gain on sale of property     760                 760    
Granite Falls Location                            
Operations Optimization Costs                            
Exit costs related to facilities     0 $ 60   $ 193       $ 559 $ 526 559   193
Pawtucket, RI manufacturing facility                            
Operations Optimization Costs                            
Restructuring Period 2 months                          
Exit costs related to facilities     85       $ 260 $ 1,272       85 $ 0 $ 260
Proceeds from the sale of property   $ 1,810                        
Gain on sale of property     760                 760    
Engineering Studies related to Facility Consolidation and Rationalization Initiative                            
Operations Optimization Costs                            
Business Development     $ 0 $ 0 $ 150       $ 0     $ 150