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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill The following table summarizes changes in the balance of goodwill during the six months ended March 31, 2021 (amounts shown in thousands):
Balance at September 30, 2020$35,669 
Foreign currency effect on goodwill59 
Balance at March 31, 2021$35,728 
Schedule of Intangible Assets Intangible assets as of March 31, 2021 and September 30, 2020, respectively, are summarized as follows (amounts shown in thousands, except for years):
March 31, 2021:Weighted Average Amortization PeriodCostAccumulated AmortizationNet
Completed technologies6.4 years$20,341 $11,026 $9,315 
Customer relationships4.8 years17,628 11,000 6,628 
Trade names4.5 years618 517 101 
Total intangible assets $38,587 $22,543 $16,044 

September 30, 2020:Weighted Average Amortization PeriodCostAccumulated AmortizationNet
Completed technologies6.4 years$20,341 $9,416 $10,925 
Customer relationships4.8 years17,628 9,390 8,238 
Trade names4.5 years618 492 126 
Total intangible assets $38,587 $19,298 $19,289 
Schedule of Estimated Future Amortization Expense
The estimated future amortization expense related to intangible assets for each of the five succeeding fiscal years is expected to be as follows (amounts shown in thousands):
 Estimated Future Amortization Expense
2021—remaining$3,104 
20225,965 
20233,915 
20241,860 
20251,200 
Total$16,044