Goodwill and Intangible Assets - Changes in Goodwill (Details) $ in Thousands	9 Months Ended
Jun. 30, 2021 USD ($)
Goodwill [Roll Forward]
Balance at September 30, 2020	$ 35,669
Acquisition of ID R&D	30,866
Foreign currency effect on goodwill	515
Balance at June 30, 2021	$ 67,050

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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