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Revenue | 12 Months Ended
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Sep. 30, 2023
Revenue from Contract with Customer [Abstract] |
Revenue | 3. Revenue The following is a disaggregation of revenue within each reportable segment:
| Fiscal Year |
(In thousands) | 2023 |  |  | 2022 |  |  | 2021 |
Medical Device |  |  |  |  |  |  |  |
Product sales | $ | 34,126 |  |  | $ | 27,930 |  |  | $ | 21,777 |
Royalties & license fees – performance coatings |  | 32,812 |  |  |  | 30,547 |  |  |  | 31,007 |
License fees – SurVeil DCB |  | 29,586 |  |  |  | 5,701 |  |  |  | 16,049 |
Research, development and other |  | 9,259 |  |  |  | 8,211 |  |  |  | 9,420 |
Medical Device revenue |  | 105,783 |  |  |  | 72,389 |  |  |  | 78,253 |
In Vitro Diagnostics |  |  |  |  |  |  |  |
Product sales |  | 26,488 |  |  |  | 26,691 |  |  |  | 24,701 |
Research, development and other |  | 313 |  |  |  | 871 |  |  |  | 2,182 |
In Vitro Diagnostics revenue |  | 26,801 |  |  |  | 27,562 |  |  |  | 26,883 |
Total Revenue | $ | 132,584 |  |  | $ | 99,951 |  |  | $ | 105,136 |
Contract assets totaled $7.8 million and $7.1 million as of September 30, 2023 and 2022, respectively, on the consolidated balance sheets. Fluctuations in the balance of contract assets result primarily from changes in sales-based and minimum royalties earned, but not collected at each balance sheet date due to payment timing and contractual changes in the normal course of business. For discussion of contract liability (deferred revenue) balances and remaining performance obligations, see Note 4 Collaborative Arrangement. Revenue from customers that equaled or exceeded 10% of total revenue was as follows:
| Fiscal Year |
| 2023 |  |  | 2022 |  |  | 2021 |
Abbott |  | 27 | % |  |  | 11 | % |  |  | 21 | %
Medtronic |  | 10 | % |  |  | 13 | % |  |  | 13 | %
Revenue by geographic region was as follows:
| Fiscal Year |
| 2023 |  |  | 2022 |  |  | 2021 |
Domestic |  | 82 | % |  |  | 74 | % |  |  | 79 | %
Foreign |  | 18 | % |  |  | 26 | % |  |  | 21 | %

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org//606/tableOfContent + Details
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