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Inventories | 12 Months Ended
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Sep. 30, 2018
Inventory Disclosure [Abstract] |
Inventories | 8. Inventories Inventories consisted of the following (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2018 |  |  | 2017 |
Finished goods |  | $ | 18,802 |  |  | $ | 33,690 |
Work in process |  |  | 7,926 |  |  |  | 2,512 |
Raw material |  |  | 54,290 |  |  |  | 70,099 |
Obsolescence reserve |  |  | (30,551 | ) |  |  | (29,614 | )
|  |  | 50,467 |  |  |  | 76,687 |
Less current portion |  |  | 18,812 |  |  |  | 20,752 |
Non-current portion |  | $ | 31,655 |  |  | $ | 55,935 |
Inventory obsolescence expense totaled approximately $4.4 million, $21.5 million and $11.2 million during fiscal years 2018, 2017 and 2016, respectively. Raw materials include semi-finished goods and component parts which totaled approximately $29.0 million and $43.2 million at September 30, 2018 and 2017, 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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