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Goodwill and Intangible Assets | 12 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible AssetsOur intangible assets consist of goodwill of $1.0 million, which is not being amortized. In Fiscal 2021, our purchased technology was fully amortized. No impairment expense has been recorded for the last three fiscal years. Intangible assets balances, subject to amortization, at September 30, 2021 and 2020 consisted of the following (in thousands):
| September 30, 2021 |  | September 30, 2020
| Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
Purchased technology | $ | 11,749 |  |  | $ | (11,749) |  |  | $ | — |  |  | $ | 11,749 |  |  | $ | (11,592) |  |  | $ | 157 |
Amortization of intangible assets recorded for the years ended September 30, 2021, 2020 and 2019 was $0.2 million, $0.2 million and $0.2 million, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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