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Convertible Senior Notes (Tables)

12 Months Ended

Sep. 30, 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):

			September 30, 2021
2026 Notes:
Principal amount			$	155,250
Less: unamortized discount and issuance costs, net of amortization			(34,332)
Carrying amount			120,918
2026 Notes embedded conversion derivative			$	48,208

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 twelve months ended September 30, 2021 (amounts shown in thousands): 

Balance at September 30, 2020			$	753
Contingent consideration associated with ID R&D Acquisition			15,690
Expenses recorded due to changes in fair value			1,080
Payment of contingent consideration associated with the ICAR acquisition			(782)
Foreign currency effect on contingent consideration			29
Balance at September 30, 2021			$	16,770

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			15,016
Fair value as of September 30, 2021			$	48,208

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 for the twelve months ended September 30, 2021 and 2020 (in thousands):

															2021						2020
Contractual interest expense															$	756					$	—
Amortization of debt discount and issuance costs															4,372						—
Total interest expense recognized															$	5,128					$	—

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