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Basis of Financial Statement Presentation (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
Gain on sale of property     $ 760                 $ 760    
Exit costs related to facilities     $ 268     $ 193           977   $ 453
Percentage of temporary reduction in the base salaries salaries of its named Executive Officers and select members of Senior Management, as well as the cash compensation of the non-employee members of the Board     20.00%                      
Severance costs     $ 183                 183    
Pawtucket, RI manufacturing facility                            
Proceeds from the sale of property   $ 1,810                        
Gain on sale of property     760                 760    
Transition period 2 months                          
Exit costs related to facilities     85       $ 260 $ 1,272       85 $ 0 260
Granite Falls Location                            
Exit costs related to facilities     0 $ 60   193       $ 559 $ 526 559   193
Other income (expense)                            
Foreign currency translation gain (loss)     155     $ 135           (451)   $ (281)
Engineering Studies related to Facility Consolidation and Rationalization Initiative                            
Business development cost     $ 0 $ 0 $ 150       $ 0     $ 150