Agreements with Endospan	12 Months Ended
Agreements with Endospan	Dec. 31, 2023
Variable Interest Entity, Primary Beneficiary, Does Not Hold Majority Voting Interest, Disclosures [Abstract]
Agreements with Endospan	Agreements with Endospan Exclusive Distribution Agreement and Securities Purchase Option Agreement On September 11, 2019 Artivion’s wholly owned subsidiary, JOTEC, entered into an exclusive distribution agreement (“Endospan Distribution Agreement”) with Endospan Ltd. (“Endospan”), an Israeli corporation, pursuant to which JOTEC obtained exclusive distribution rights for NEXUS, and under a subsequent amendment, the NEXUS DUO (collectively the “NEXUS Products”) and accessories in certain countries in Europe in exchange for a fixed distribution fee of $9.0 million paid in September 2019. We also entered into a securities purchase option agreement (“Endospan Option”) with Endospan for $1.0 million paid in September 2019. The Endospan Option Agreement provides Artivion the option to purchase all the outstanding securities of Endospan from Endospan’s securityholders at the time of acquisition, or the option to acquire all of Endospan’s assets, in each case, for a price between $350.0 and $450.0 million before, or within a certain period of time after FDA approval of NEXUS, with such option expiring if not exercised within 90 days after receiving notice that Endospan has received approval from the FDA for NEXUS. Loan Agreement Artivion and Endospan also entered into a loan agreement (“Endospan Loan”), dated September 11, 2019, in which Artivion agreed to provide Endospan a secured loan of up to $15.0 million to be funded in three tranches of $5.0 million each. The first tranche of the Endospan Loan was funded upon execution of the agreement in September 2019. In September 2020 we funded the second tranche payment of $5.0 million upon the certification of the NEXUS IDE from the FDA. In May 2023 we funded the third tranche payment of $5.0 million upon the certification of enrollment of 50% of the required number of patients in the primary arm of the FDA approved clinical trial for NEXUS. Variable Interest Entity We consolidate the results of a variable interest entity ("VIE") when it is determined that we are the primary beneficiary. Based on our initial evaluation of Endospan and the related agreements with Endospan, we determined that Endospan is a VIE. Although the arrangement with Endospan resulted in our holding a variable interest, it did not empower us to direct those activities of Endospan that most significantly impact the VIE economic performance. Therefore, we are not the primary beneficiary, and we have not consolidated Endospan into our financial results. Our payments to Endospan in September 2019 totaled $15.0 million which included a $9.0 million distribution fee, a $1.0 million securities purchase option, and $5.0 million for the first tranche of the Endospan Loan. The second tranche payment of $5.0 million was funded in September 2020. An additional $5.0 million was funded in May 2023 as part of the third tranche payment described above. We evaluated Endospan for VIE classification as of December 31, 2023 and determined that Endospan meets the criteria of a non-consolidating VIE. Our payments to date, including any loans, guarantees, and other subordinated financial support related to this VIE, totaled $25.0 million as of December 31, 2023, representing our maximum exposure to loss, and were not individually significant to our consolidated financial statements. Valuation The agreements with Endospan were entered into concurrently and had certain terms that are interrelated. In our evaluation of the initial relative fair value of each of the Endospan agreements to determine the amount to record, we utilized discounted cash flows to estimate the fair market value for the Endospan Loan and for the Endospan Distribution Agreement. We estimated the fair value of the Endospan Option utilizing the Monte Carlo simulation. Inputs in our valuation of the Endospan agreements included cash payments and anticipated payments based on the executed agreements with Endospan, projected discounted cash flows in connection with the Endospan transaction, our expected internal rate of return and discount rates, and our assessed probability and timing of receipt of certification of certain approvals and milestones in obtaining FDA approval. Based on the initial fair value of the Endospan Loan and the relative fair values of the Endospan Distribution Agreement and Endospan Option Agreement, we recorded the Endospan Loan value of $358,000 in Other long-term assets in the Consolidated Balance Sheets as of December 31, 2019. The value of the Endospan Distribution Agreement of $1.8 million and $3.5 million was included in Other intangibles, net in the Consolidated Balance Sheets as of December 31, 2023 and 2022, respectively. We elected the fair value option for recording the Endospan Loan. We assess the fair value of the Endospan Loan based on quantitative and qualitative characteristics, and adjust the amount recorded to its current fair market value at each reporting period. We performed an assessment of the fair value of the Endospan Loan and determined that the loan fair value decreased and had no value as of December 31, 2021. As a result of this fair value adjustment, we recorded an expense of $409,000 in Other expense, net on the Consolidated Statements of Operations and Comprehensive Loss during twelve months ended December 31, 2021. In May 2023 we funded a $5.0 million third tranche payment and determined that the loan continued to have no fair value. Consequently, we recorded an expense of $5.0 million in Other expense, net on the Consolidated Statements of Operations and Comprehensive Loss during the twelve months ended December 31, 2023. We did not record a loan fair value adjustment during the twelve months ended December 31, 2022. In the fourth quarter of December 31, 2021 we fully impaired the value of the Endospan Option primarily driven by a decrease in forecasted operating results. We recorded $4.9 million impairment expense included in General, administrative, and marketing expense on the Consolidated Statements of Operations and Comprehensive Loss during the twelve months ended December 31, 2021.