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Detail of Selected Balance Sheet Accounts
 12 Months Ended
Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Detail of Selected Balance Sheet Accounts Detail of Selected Balance Sheet Accounts
Inventories
The components of inventories are summarized below (in thousands): 
 September 30,
 20242023
Raw materials, parts and sub-assemblies$92,314 $68,631 
Work-in-progress920 1,379 
Provision for excess and obsolete inventories(7,361)(6,145)
Total inventories$85,873 $63,865 
Property, Plant and Equipment
Property, plant and equipment are summarized below (in thousands): 
 September 30,Range of
 20242023Asset Lives
Land$24,110 $21,526 —
Buildings and improvements127,094 121,454 
3 – 39 Years
Machinery and equipment94,889 92,477 
3 – 15 Years
Furniture and fixtures2,885 3,726 
3 – 10 Years
Construction in process3,317 4,129 —
 $252,295 $243,312  
Less: Accumulated depreciation(148,874)(145,687) 
Total property, plant and equipment, net$103,421 $97,625  
There were no assets under finance lease as of September 30, 2024 or September 30, 2023. Depreciation expense was $6.9 million, $8.6 million and $9.4 million for fiscal years 2024, 2023, and 2022, respectively.
On July 1, 2024, we acquired land and buildings in Houston, Texas, for a total cash purchase price of approximately $5.6 million to help further facilitate executing the current backlog as well as planning for modest future volume growth.
Accrued Product Warranty
Activity in our product warranty accrual consisted of the following (in thousands): 
 September 30,
 20242023
Balance at beginning of period$3,305 $2,345 
Increase to warranty expense7,525 3,752 
Deduction for warranty charges(5,039)(2,800)
Change due to foreign currency translation31 8 
Balance at end of period$5,822 $3,305