| Cover | Aug. 03, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Current Report on Form 8-K/A amends the Current Report on Form 8-K filed August 3, 2023 (the “Original Report”) pursuant to which Clearfield, Inc. (the “Company”) reported the issuance of a press release announcing the results of its third quarter of fiscal year 2023. A copy of the press release issued and furnished with the Original Report inadvertently included a duplicate Consolidated Statement of Cashflows and no Consolidated Balance Sheets. On August 3, 2023, the Company issued a corrected press release. No other changes have been made to the Original Form 8-K. |
| Document Period End Date | Aug. 03, 2023 |
| Entity File Number | 000-16106 |
| Entity Registrant Name | CLEARFIELD, INC. |
| Entity Central Index Key | 0000796505 |
| Entity Tax Identification Number | 41-1347235 |
| Entity Incorporation, State or Country Code | MN |
| Entity Address, Address Line One | 7050 Winnetka Avenue North |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Brooklyn Park |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55428 |
| City Area Code | (763) |
| Local Phone Number | 476-6866 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | CLFD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
