Clearfield, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Note 15 - Leases (Details Textual)

v3.26.1

Note 15 - Leases (Details Textual)		1 Months Ended		3 Months Ended		6 Months Ended
Note 15 - Leases (Details Textual)	Mar. 31, 2026 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2024 USD ($) ft²	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Nov. 19, 2021 ft²	Jan. 01, 2015 ft²
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability						$ 3,553,000	$ 0
Operating Lease, Weighted Average Remaining Lease Term	4 years 1 month 6 days			4 years 1 month 6 days	3 years 6 months 21 days	4 years 1 month 6 days	3 years 6 months 21 days
Operating Lease, Weighted Average Discount Rate, Percent	7.15%			7.15%	7.34%	7.15%	7.34%
Operating Lease, Payments				$ 838,000	$ 819,000	$ 1,673,000	$ 1,635,000
7050 Winnetka Avenue North, Brooklyn Park, Minnesota [Member]
Area of Real Estate Property \| ft²									85,000
Lessee, Operating Lease, Term of Contract									10 years 2 months
Lessee, Operating Lease, Renewal Term			3 years
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 1,337,000
Tijuana, Mexico 3 [Member]
Area of Real Estate Property \| ft²			318,000
Lessee, Operating Lease, Term of Contract			7 years
Lessee, Operating Lease, Renewal Term			5 years
Operating Lease, Monthly Payment			$ 169,000
Operating Lease, Payments, Annual Increase, Percentage			2.00%
Tijuana, Mexico 3 [Member] \| Lease Mandatory Contractual Term [Member]
Lessee, Operating Lease, Term of Contract			5 years
Brooklyn Park, MN [Member]
Area of Real Estate Property \| ft²								105,000
Lessee, Operating Lease, Term of Contract								5 years
Increase (Decrease) in Operating Lease Liability	$ 3,553,000

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