Annual report pursuant to Section 13 and 15(d)

Financial Information from Continuing Operations By Geographic Region (Detail)

v3.20.2
Financial Information from Continuing Operations By Geographic Region (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Geographic Reporting Disclosure [Line Items]      
Percentage Of Export Sales From Domestic To Total Net Sales 7.30% 7.40% 7.90%
Assets $ 824,294 $ 1,124,274  
Net sales $ 493,292 $ 654,758 $ 641,303
Largest customer sales in fiscal year, percent 3.00% 3.00% 3.00%
Property, plant & equipment, net $ 61,405 $ 56,729  
United States      
Geographic Reporting Disclosure [Line Items]      
Net sales 185,279 249,644 $ 236,036
Property, plant & equipment, net 21,410 21,047  
GERMANY      
Geographic Reporting Disclosure [Line Items]      
Net sales 24,401 26,445 30,643
UNITED KINGDOM      
Geographic Reporting Disclosure [Line Items]      
Net sales 24,033 30,127 35,388
Property, plant & equipment, net 9,654 2,983  
SAUDI ARABIA      
Geographic Reporting Disclosure [Line Items]      
Net sales 19,787 21,625 20,749
AUSTRALIA      
Geographic Reporting Disclosure [Line Items]      
Net sales 19,332 25,749 30,796
BRAZIL      
Geographic Reporting Disclosure [Line Items]      
Net sales 16,413 18,779 17,900
Property, plant & equipment, net 1,784 2,851  
CANADA      
Geographic Reporting Disclosure [Line Items]      
Net sales 15,924 18,686 20,172
China      
Geographic Reporting Disclosure [Line Items]      
Net sales 15,058 18,548 19,239
Property, plant & equipment, net 12,248 12,179  
UNITED ARAB EMIRATES      
Geographic Reporting Disclosure [Line Items]      
Property, plant & equipment, net 7,525 8,734  
NETHERLANDS      
Geographic Reporting Disclosure [Line Items]      
Property, plant & equipment, net 2,546 2,720  
KAZAKHSTAN      
Geographic Reporting Disclosure [Line Items]      
Property, plant & equipment, net 2,052 2,635  
SPAIN      
Geographic Reporting Disclosure [Line Items]      
Property, plant & equipment, net 1,705 1,244  
All Other      
Geographic Reporting Disclosure [Line Items]      
Net sales 173,065 245,155 $ 230,380
Property, plant & equipment, net 2,481 2,336  
General Corporate      
Geographic Reporting Disclosure [Line Items]      
Assets $ 171,103 $ 230,597