Commitments and Contingencies	12 Months Ended
Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies Litigation. From time to time, the Company may become involved in various legal actions involving its operations, products and technologies, including intellectual property and employment disputes. The outcomes of these legal actions are not within the Company’s complete control and may not be known for prolonged periods of time. In some actions, the claimants seek damages as well as other relief, including injunctions barring the sale of products that are the subject of the lawsuit, which if granted, could require significant expenditures or result in lost revenue. The Company records a liability on the consolidated financial statements for these actions when a loss is known or considered probable and the amount can be reasonably estimated. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate, the minimum amount of the range is accrued. If a loss is possible but not known or probable, and can be reasonably estimated, the estimated loss or range of loss is disclosed. In most cases, significant judgment is required to estimate the amount and timing of a loss to be recorded. Clinical Trials. The Company has engaged CRO consultants to assist with the administration of its ongoing clinical trials. The Company has executed separate contracts with two CROs for services rendered in connection with the TRANSCEND pivotal clinical trial for the SurVeil DCB, including pass-through expenses paid by the CROs, of up to $29 million in the aggregate. As of September 30, 2021, an estimated $7 million remains to be paid on these contracts, which may vary depending on actual pass-through expenses incurred to execute the trial. The Company estimates that the total cost of the TRANSCEND clinical trial will be in the range of $37 million to $40 million from inception to completion. In the event the Company were to terminate any trial, it may incur certain financial penalties, which would become payable to the CRO for costs to wind down the terminated trial. Asset Acquisitions. In fiscal 2019, the Company acquired certain intellectual property assets to support ongoing development of the Company’s medical device pipeline and paid the sellers $0.8 million in fiscal 2019 and $0.2 million in fiscal 2021. An additional $1.1 million in payments is contingent upon achievement of certain strategic milestones within a contingency period ending in 2022. In fiscal 2019, the Company recorded a charge totaling $0.9 million related to this acquisition in acquired IPR&D expense on the consolidated statements of operations. In fiscal 2018, the Company acquired certain intellectual property assets of Embolitech, LLC (the “Embolitech Transaction”). As part of the Embolitech Transaction, the Company paid the sellers $5.0 million in fiscal 2018, $1.0 million in fiscal 2020 and $1.0 million in fiscal 2021. The Company is obligated to pay additional installments totaling $2.5 million fiscal 2022 through fiscal 2024. These payments may be accelerated upon the occurrence of certain sales and regulatory milestones. An additional $1.0 million payment is contingent upon the achievement of a certain regulatory milestone within a contingency period ending in 2033. Business Combinations. See Note 12 Acquisitions for disclosure of the fiscal 2021 acquisition of Vetex and associated deferred and contingent consideration liabilities. As of September 30, 2021, $6.4 million was recorded in other long-term liabilities on the consolidated balance sheets related to deferred and contingent consideration obligations for asset acquisitions and business combinations. As of September 30, 2020, $1.1 million and $2.2 million was recorded on the consolidated balance sheets in other accrued liabilities and other long-term liabilities, respectively, related to deferred and contingent consideration obligations for asset acquisitions. See Note 5 Fair Value Measurements for further disclosure of contingent consideration.

Commitments and Contingencies

12 Months Ended

Sep. 30, 2021

Commitments And Contingencies Disclosure [Abstract]

11. Commitments and Contingencies

Litigation. From time to time, the Company may become involved in various legal actions involving its operations, products and technologies, including intellectual property and employment disputes. The outcomes of these legal actions are not within the Company’s complete control and may not be known for prolonged periods of time. In some actions, the claimants seek damages as well as other relief, including injunctions barring the sale of products that are the subject of the lawsuit, which if granted, could require significant expenditures or result in lost revenue. The Company records a liability on the consolidated financial statements for these actions when a loss is known or considered probable and the amount can be reasonably estimated. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate, the minimum amount of the range is accrued. If a loss is possible but not known or probable, and can be reasonably estimated, the estimated loss or range of loss is disclosed. In most cases, significant judgment is required to estimate the amount and timing of a loss to be recorded.

Clinical Trials. The Company has engaged CRO consultants to assist with the administration of its ongoing clinical trials. The Company has executed separate contracts with two CROs for services rendered in connection with the TRANSCEND pivotal clinical trial for the SurVeil DCB, including pass-through expenses paid by the CROs, of up to $29 million in the aggregate. As of September 30, 2021, an estimated $7 million remains to be paid on these contracts, which may vary depending on actual pass-through expenses incurred to execute the trial. The Company estimates that the total cost of the TRANSCEND clinical trial will be in the range of $37 million to $40 million from inception to completion. In the event the Company were to terminate any trial, it may incur certain financial penalties, which would become payable to the CRO for costs to wind down the terminated trial.

Asset Acquisitions. In fiscal 2019, the Company acquired certain intellectual property assets to support ongoing development of the Company’s medical device pipeline and paid the sellers $0.8 million in fiscal 2019 and $0.2 million in fiscal 2021. An additional $1.1 million in payments is contingent upon achievement of certain strategic milestones within a contingency period ending in 2022. In fiscal 2019, the Company recorded a charge totaling $0.9 million related to this acquisition in acquired IPR&D expense on the consolidated statements of operations.

In fiscal 2018, the Company acquired certain intellectual property assets of Embolitech, LLC (the “Embolitech Transaction”). As part of the Embolitech Transaction, the Company paid the sellers $5.0 million in fiscal 2018, $1.0 million in fiscal 2020 and $1.0 million in fiscal 2021. The Company is obligated to pay additional installments totaling $2.5 million fiscal 2022 through fiscal 2024. These payments may be accelerated upon the occurrence of certain sales and regulatory milestones. An additional $1.0 million payment is contingent upon the achievement of a certain regulatory milestone within a contingency period ending in 2033.

Business Combinations. See Note 12 Acquisitions for disclosure of the fiscal 2021 acquisition of Vetex and associated deferred and contingent consideration liabilities.

As of September 30, 2021, $6.4 million was recorded in other long-term liabilities on the consolidated balance sheets related to deferred and contingent consideration obligations for asset acquisitions and business combinations. As of September 30, 2020, $1.1 million and $2.2 million was recorded on the consolidated balance sheets in other accrued liabilities and other long-term liabilities, respectively, related to deferred and contingent consideration obligations for asset acquisitions. See Note 5 Fair Value Measurements for further disclosure of contingent consideration.