Goodwill and Intangible Assets	6 Months Ended
Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	8. Goodwill and Intangible Assets During the three months ended March 31, 2021, we completed our annual assessment for impairment of goodwill and other intangible assets. For goodwill, we used a qualitative analysis and our actual and forecasted results are exceeding the estimates from the last quantitative test. No material impairment losses were recognized in the current or prior periods presented in connection with our goodwill and other intangible assets. For the three months ended March 31, 2021 and 2020, amortization expense related to other intangible assets was $1.6 million and $2.2 million, respectively, and for the six months ended March 31, 2021 and 2020, amortization expense was $3.3 million and $4.6 million, respectively. Additionally during the six months ended March 31, 2021, goodwill increased $4.6 million primarily from the effects of foreign currency exchange rates.

Goodwill and Intangible Assets

6 Months Ended

Mar. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

8. Goodwill and Intangible Assets

During the three months ended March 31, 2021, we completed our annual assessment for impairment of goodwill and other intangible assets. For goodwill, we used a qualitative analysis and our actual and forecasted results are exceeding the estimates from the last quantitative test. No material impairment losses were recognized in the current or prior periods presented in connection with our goodwill and other intangible assets.

For the three months ended March 31, 2021 and 2020, amortization expense related to other intangible assets was $1.6 million and $2.2 million, respectively, and for the six months ended March 31, 2021 and 2020, amortization expense was $3.3 million and $4.6 million, respectively.

Additionally during the six months ended March 31, 2021, goodwill increased $4.6 million primarily from the effects of foreign currency exchange rates.