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Goodwill and Intangible Assets | 3 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS | GOODWILL AND INTANGIBLE ASSETS Goodwill The Company had a goodwill balance of $34.1 million at December 31, 2018, representing the excess of costs over fair value of 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 350. The following table summarizes changes in the balance of goodwill during the three months ended December 31, 2018 (amounts shown in thousands):
Balance at September 30, 2018 | $ | 34,407
A2iA purchase accounting adjustment | 121
Foreign currency effect on goodwill | (470)
Balance at December 31, 2018 | $ | 34,058
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 December 31, 2018 and September 30, 2018, respectively, are summarized as follows (amounts shown in thousands, except for years):
December 31, 2018: | Weighted Average Amortization Period |  | Cost |  | Accumulated Amortization |  | Net
Completed technologies | 6.4 years |  | $ | 20,341 |  | $ | 4,113 |  | $ | 16,228
Customer relationships | 4.8 years |  | 17,628 |  | 3,472 |  | 14,156
Trade names | 4.5 years |  | 618 |  | 260 |  | 358
Total intangible assets |  |  | $ | 38,587 |  | $ | 7,845 |  | $ | 30,742
September 30, 2018: | Weighted Average Amortization Period |  | Cost |  | Accumulated Amortization |  | Net
Completed technologies | 6.4 years |  | $ | 20,341 |  | $ | 3,070 |  | $ | 17,271
Customer relationships | 4.8 years |  | 17,628 |  | 2,351 |  | 15,277
Trade names | 4.5 years |  | 618 |  | 219 |  | 399
Total intangible assets |  |  | $ | 38,587 |  | $ | 5,640 |  | $ | 32,947
Amortization expense related to acquired intangible assets was $1.8 million and $0.5 million for the three months ended December 31, 2018 and 2017, respectively, and is recorded within acquisition-related costs and expenses on the consolidated statements of operations and other comprehensive loss. 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
2019 (remaining nine months) | $ | 5,345
2020 | 6,510
2021 | 6,238
2022 | 5,835
2023 | 3,830
2024 | 1,813
Thereafter | 1,171
Total | $ | 30,742

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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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