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Fair Value Measurements - Business Combination Contingent Consideration - Additional Information (Details)	1 Months Ended		9 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 EUR (€)	Oct. 02, 2020 USD ($) Installment	Oct. 02, 2020 EUR (€)	Jul. 31, 2019 USD ($)	Jul. 31, 2019 EUR (€)	Apr. 16, 2019 USD ($)	Apr. 16, 2019 EUR (€)
Business Acquisition [Line Items]
Payment for contingent consideration	$ 1,100,000	€ 1,000,000.0	$ 1,135,000
ARGES GmbH
Business Acquisition [Line Items]
Undiscounted low range of contingent consideration						€ 0
Undiscounted high range of contingent consideration						10,000,000.0
Fair value of contingent consideration			$ 7,600,000	€ 6,400,000	$ 7,900,000	€ 7,100,000
Ingenia-CAT, S.L.
Business Acquisition [Line Items]
Undiscounted low range of contingent consideration								€ 0
Undiscounted high range of contingent consideration								8,000,000.0
Fair value of contingent consideration							$ 6,600,000	€ 5,800,000
Number of contingent consideration annual installments | Installment			3
Changes in fair value of contingent consideration | $			$ 0

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Number of contingent consideration payment annual installments.

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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

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For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

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