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Schedule of Valuation and Qualifying Accounts | 12 Months Ended
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Sep. 30, 2019
Valuation And Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts | Surmodics, Inc. Valuation and Qualifying Accounts (In thousands)
Description (1) |  | Balance at Beginning of Period |  |  | Additions Charged (Credited) to Expenses |  |  | Deductions From Reserves |  |  |  | Balance at End of Period |
Year Ended September 30, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 19 |  |  | $ | 222 |  |  | $ | 11 |  | (a) |  | $ | 230 |
Year Ended September 30, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 230 |  |  | $ | 64 |  |  | $ | 147 |  | (a) |  | $ | 147 |
Year Ended September 30, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 147 |  |  | $ | 188 |  |  | $ | 135 |  | (a) |  | $ | 200 |
(1) | Uncollectible accounts written off and adjustments to the allowance.

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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 -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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