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Segment Information
 12 Months Ended
Sep. 30, 2020
Segment Reporting [Abstract]  
Segment Information Segment Information
We manage our business as one reportable operating segment related to the development, design, manufacturing and servicing of custom-engineered equipment and systems for the distribution, control and monitoring of electrical energy.
Revenues by country represent sales to unaffiliated customers as determined by the ultimate destination of our products and services, summarized for the last three fiscal years by region in the table below (in thousands):
 Year Ended September 30,
 202020192018
United States$397,983 $406,609 $335,743 
Canada66,064 64,326 42,235 
Middle East and Africa18,162 18,420 38,490 
Far East18,079 11,405 12,976 
Europe15,866 13,746 10,538 
Mexico, Central and South America2,345 2,674 8,734 
Total revenues$518,499 $517,180 $448,716 
Long-lived assets by country consist of property, plant and equipment, net of accumulated depreciation and are determined based on the location of the tangible assets, summarized for the last two fiscal years in the table below (in thousands):
 September 30,
 20202019
Long-lived assets:  
United States$67,071 $71,325 
Canada42,580 44,933 
United Kingdom4,721 4,554 
Total$114,372 $120,812