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Convertible Senior Notes (Tables)

6 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Schedule of Carrying Values of Company's 2026 Notes

The carrying values of the Company’s 2026 Notes are as follows (in thousands):

			March 31, 2021
2026 Notes:
Principal amount			$	155,250
Less: unamortized discount and issuance costs, net of amortization			(37,558)
Carrying amount			$	117,692
2026 Notes embedded conversion derivative			$	34,719

Schedule of Changes in Fair Value of Embedded Conversion Derivative

The following table includes a summary of the contingent consideration measured at fair value using significant unobservable inputs (Level 3) during the six months ended March 31, 2021 (amounts shown in thousands):

Balance at September 30, 2020			$	753
Foreign currency effect on contingent consideration			29
Payment of contingent consideration			$	(782)
Balance at March 31, 2021			$	—

The following table presents the fair value and the change in fair value for the embedded conversion derivative (in thousands):

Embedded conversion derivative
Fair value as of February 5, 2021			$	33,192
Change in fair value			1,527
Fair value as of March 31, 2021			$	34,719

Schedule of Interest Costs Recognized Related to 2026 Notes

The following table presents the total amount of interest cost recognized relating to the 2026 Notes (in thousands):

			Three Months Ended March 31,												Six Months Ended March 31,
			2021						2020						2021						2020
Contractual interest expense			$	172					$	—					$	172					$	—
Amortization of debt discount and issuance costs			1,147						—						1,147						—
Total interest expense recognized			$	1,319					$	—					$	1,319					$	—

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Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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