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Inventories
 12 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories

9. Inventories

Inventories consisted of the following (in thousands):

 

 

 

AS OF SEPTEMBER 30,

 

 

 

2019

 

 

2018

 

Finished goods

 

$

17,967

 

 

$

18,802

 

Work in process

 

 

3,681

 

 

 

7,926

 

Raw materials

 

 

55,781

 

 

 

54,290

 

Obsolescence reserve

 

 

(32,050

)

 

 

(30,551

)

 

 

 

45,379

 

 

 

50,467

 

Less current portion

 

 

23,855

 

 

 

18,812

 

Non-current portion

 

$

21,524

 

 

$

31,655

 

 

Inventory obsolescence expense totaled approximately $4.6 million and $4.4 million during fiscal years 2019 and 2018, respectively.  Raw materials include semi-finished goods and component parts that totaled approximately $25.2  million and $29.0 million at September 30, 2019 and 2018, respectively.