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Intangible Assets, Net | 9 Months Ended
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Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets, Net | Intangible Assets, Net Intangible assets are stated at amortized cost and consist of the following:
In thousands |  | June 30, 2022 |  | September 30, 2021
| Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Patents and licenses |  | $ | 28,556 |  |  | $ | (8,531) |  |  | $ | 20,025 |  |  | $ | 32,982 |  |  | $ | (9,207) |  |  | $ | 23,775 |
Developed technology (a) |  | 28,666 |  |  | (2,119) |  |  | 26,547 |  |  | 12,600 |  |  | (1,050) |  |  | 11,550 |
Customer relationship/Trade names (a) |  | 8,638 |  |  | (2,669) |  |  | 5,969 |  |  | — |  |  | — |  |  | — |
Other (a) |  | 1,212 |  |  | (257) |  |  | 955 |  |  | 894 |  |  | (162) |  |  | 732 |
Total |  | $ | 67,072 |  |  | $ | (13,576) |  |  | $ | 53,496 |  |  | $ | 46,476 |  |  | $ | (10,419) |  |  | $ | 36,057 |
(a) The developed technology intangible assets and customer relationship/trade names intangible assets included $16.5 million and $4.3 million, respectively, related to the business acquisition discussed in Note 4 - Business Combinations. Intangible assets are amortized over their estimated useful lives on a straight-line basis. Total amortization expense for the three months ended June 30, 2022 and 2021 was $1.3 million and $0.9 million, respectively. Total amortization expense for the nine months ended June 30, 2022 and 2021 was $3.2 million and $2.6 million, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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