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Detail of Selected Balance Sheet Accounts
 3 Months Ended
Dec. 31, 2023
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):
December 31, 2023September 30, 2023
Raw materials, parts and sub-assemblies$74,181 $68,631 
Work-in-progress2,056 1,379 
Provision for excess and obsolete inventories(6,555)(6,145)
Total inventories$69,682 $63,865 
Property, Plant and Equipment
Property, plant and equipment are summarized below (in thousands):
 December 31, 2023September 30, 2023
Land$21,729 $21,526 
Buildings and improvements122,706 121,454 
Machinery and equipment93,636 92,477 
Furniture and fixtures3,792 3,726 
Construction in process4,434 4,129 
$246,297 $243,312 
Less: Accumulated depreciation(147,979)(145,687)
Total property, plant and equipment, net$98,318 $97,625 

There were no assets under finance lease as of December 31, 2023 or September 30, 2023.

Intangible Asset
In December 2023, we acquired intellectual property for a total consideration of $0.5 million, of which $250 thousand was paid in cash.

Accrued Product Warranty
Activity in our product warranty accrual consisted of the following (in thousands):
 Three months ended December 31,
 20232022
Balance at beginning of period$3,305 $2,345 
Increase to warranty expense1,127 479 
Deduction for warranty charges(774)(454)
Change due to foreign currency translation22 10 
Balance at end of period$3,680 $2,380