Insider Trading Arrangements |
3 Months Ended |
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Dec. 31, 2025
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| Trading Arrangements, by Individual [Table] | |
| Material Terms of Trading Arrangement [Text Block] |
On December 15, 2025, Cheryl Beranek, President and Chief Executive Officer, adopted a trading plan (with a first possible trade date of April 1, 2026) intended to satisfy Rule 10b5-1(c) to sell up to 180,000 shares of Clearfield, Inc. common stock over a period ending on September 30, 2027, subject to certain conditions. |
| Trading Arrangement Adoption Date | December 15, 2025 |
| Trading Arrangement, Individual Name | Cheryl Beranek |
| Trading Arrangement, Individual Title | President and Chief Executive Officer |
| Rule 10b5-1 Arrangement Adopted [Flag] | true |
| Non-Rule 10b5-1 Arrangement Adopted [Flag] | false |
| Rule 10b5-1 Arrangement Terminated [Flag] | false |
| Non-Rule 10b5-1 Arrangement Terminated [Flag] | false |
| Trading Arrangement, Securities Aggregate Available Amount | 180,000 |
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