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Segment Information
 12 Months Ended
Sep. 30, 2025
Segment Reporting [Abstract]  
Segment Information Segment Information
We manage our business as one reportable, operating segment and our revenues are primarily generated from the development, design, manufacturing and servicing of custom-engineered equipment and systems for the distribution, control and monitoring of electrical energy.
Our chief operating decision maker (“CODM”) is our chief executive officer. The CODM manages and allocates resources on a total consolidated basis by assessing performance of revenues and earnings before interest and taxes (“EBIT”) using actual-to-actual, actual-to-plan and actual-to-forecast variance analysis. The measure of segment profit and loss regularly provided to the CODM that is most consistent with GAAP is consolidated net income, as presented in our Consolidated Statements of Operations. The CODM does not manage cost components by product, customer type or service type, nor does the CODM regularly receive disaggregated information at this level.
For the years ended September 30, 2025, 2024 and 2023, the summary of segment net income, including segment expenses, for our single reportable segment were as follows (in thousands):
 Year Ended September 30,
 202520242023
Revenues$1,104,318 $1,012,356 $699,308 
Segment operating expenses:
Cost of goods sold779,937 739,268 551,755 
General and administrative expenses65,569 57,037 52,819 
Sales and marketing expenses29,551 27,063 25,642 
Research and development expenses11,008 9,427 6,220 
Other expense(1)
393 788 352 
Total segment operating expenses886,458 833,583 636,788 
Operating income / EBIT217,860 178,773 62,520 
Interest income, net(15,690)(17,315)(6,430)
Income tax provision52,803 46,240 14,425 
Segment net income$180,747 $149,848 $54,525 
Gross profit324,381 273,088 147,553 
(1) Other expense includes realized currency loss of $0.3 million, $0.8 million, and $0.4 million, respectively.
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,
 202520242023
United States$880,222 $846,526 $557,934 
Canada157,191 106,521 84,090 
Middle East and Africa27,440 13,440 14,998 
Europe25,072 31,388 26,699 
Asia/Pacific9,283 6,850 6,188 
Mexico, Central and South America5,110 7,631 9,399 
Total revenues$1,104,318 $1,012,356 $699,308 

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,
 20252024
Long-lived assets:  
United States$70,699 $64,560 
Canada32,744 34,456 
United Kingdom7,606 4,405 
Total$111,049 $103,421