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Goodwill and Intangible Assets
 12 Months Ended
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, 2021September 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.