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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2023
Notes to Financial Statements |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | UFP TECHNOLOGIES, INC. Consolidated Financial Statement Schedule Valuation and Qualifying Accounts Years ended December 31, 2023, 2022, and 2021 Accounts receivable, allowance for credit losses:
|  | 2023 |  |  | 2022 |  |  | 2021 |
Balance at beginning of year |  | $ | 733 |  |  | $ | 519 |  |  | $ | 484 |
Provision for bad debt |  |  | 15 |  |  |  | 293 |  |  |  | 179 |
Write-offs, net of recoveries |  |  | (21 | ) |  |  | (40 | ) |  |  | (144 | )
Sale of Molded Fiber business |  |  | - |  |  |  | (39 | ) |  |  | - |
Balance at end of year |  | $ | 727 |  |  | $ | 733 |  |  | $ | 519 |

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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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