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Goodwill and Intangible Assets
 12 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS
6. GOODWILL AND INTANGIBLE ASSETS
Goodwill
The Company has goodwill balances of $35.7 million and $32.6 million at September 30, 2020 and 2019, respectively, representing the excess of costs over fair value of net assets of businesses acquired. Goodwill acquired in a business combination and determined to have an indefinite useful life is not amortized, but instead is tested for impairment at least annually in accordance with ASC Topic 350. The following table summarizes changes in the balance of goodwill during the year ended September 30, 2020 (amounts shown in thousands):

Balance at September 30, 2019$32,636 
Other adjustments(1)
806 
Foreign currency effect on goodwill2,227 
Balance at September 30, 2020$35,669 
(1) During the three months ended December 31, 2019, the Company determined that it had incorrectly classified $0.8 million of contract assets in its fair value estimate associated with the A2iA Acquisition. This asset was incorrectly recorded as other non-current assets with an offset to goodwill on the Company’s consolidated balance sheet during the three months ended June 30, 2018 and subsequent financial statements. The Company has determined that the adjustment was not material to any previously reported financial statements. Therefore, the consolidated balance sheet as of September 30, 2020 has been adjusted
Intangible Assets
Intangible assets include the value assigned to purchased completed technology, customer relationships, and trade names. The estimated useful lives for all of these intangible assets, range from two to seven years. Intangible assets as of September 30, 2020 and 2019 are summarized as follows (amounts shown in thousands, except for years):
September 30, 2020:
Weighted
Average
Amortization
Period
Cost
Accumulated
Amortization
Net
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 

September 30, 2019:
Weighted
Average
Amortization
Period
Cost
Accumulated
Amortization
Net
Completed technologies6.4 years$20,341 $7,104 $13,237 
Customer relationships4.8 years17,628 6,701 10,927 
Trade names4.5 years618 377 241 
Total intangible assets$38,587 $14,182 $24,405 
 
Amortization expense related to acquired intangible assets was $6.4 million, $7.0 million, and $4.0 million for fiscal years ended September 30, 2020, 2019, and 2018, respectively and is recorded in acquisition-related costs and expenses in the consolidated statements of operations.
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$6,368 
20225,956 
20233,909 
20241,857 
20251,199 
Thereafter— 
Total$19,289