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Schedule of Valuation and Qualifying Accounts | 12 Months Ended
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Sep. 30, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts | Surmodics, Inc. Schedule II – Valuation and Qualifying Accounts
(In thousands) |  | Balance at Beginning of Fiscal Year |  |  | Additions: Charges to Income |  |  | Deductions: Other Changes (Debit) Credit |  |  |  | Balance at End of Fiscal Year |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |  |  |  |
Fiscal year ended September 30, 2021 |  | $ | 130 |  |  |  | (11 | ) |  |  | — |  | (a) |  | $ | 119 |
Fiscal year ended September 30, 2022 |  |  | 119 |  |  |  | 5 |  |  |  | (43 | ) | (a) |  |  | 81 |
Fiscal year ended September 30, 2023 |  |  | 81 |  |  |  | 37 |  |  |  | (38 | ) | (a) |  |  | 80 |
(a) Primarily consists of uncollectible accounts written off, less recoveries.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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