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Inventories | 12 Months Ended
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Sep. 30, 2021
Inventory Disclosure [Abstract] |
Inventories | 8. Inventories Inventories consisted of the following (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2021 |  |  | 2020 |
Finished goods |  | $ | 19,368 |  |  | $ | 20,798 |
Work in process |  |  | 8,247 |  |  |  | 984 |
Raw materials |  |  | 43,620 |  |  |  | 47,041 |
Obsolescence reserve (net realizable value adjustment) |  |  | (36,936 | ) |  |  | (34,960 | )
|  |  | 34,299 |  |  |  | 33,863 |
Less current portion |  |  | 16,196 |  |  |  | 16,933 |
Non-current portion |  | $ | 18,103 |  |  | $ | 16,930 |
Inventory obsolescence expense totaled approximately $3.0 million and $4.7 million during fiscal years 2021 and 2020, respectively. Raw materials include semi-finished goods and component parts that totaled approximately $22.7 million and $24.3 million at September 30, 2021 and 2020, respectively. Finished goods and raw materials that totaled $23.3 million and $21.8 million were fully reserved at September 30, 2021 and 2020, respectively.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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