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

Quarterly report [Sections 13 or 15(d)]

Note 9 - Major Customer Concentration (Details Textual)

Note 9 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Sep. 30, 2025
Revenue Benchmark [Member]
Number of Major Customers	3	3	3	3
Revenue Benchmark [Member] \| Customer A [Member]
Concentration Risk, Percentage	15.00%	16.00%	15.00%	16.00%
Revenue Benchmark [Member] \| Customer B [Member]
Concentration Risk, Percentage	15.00%	14.00%	14.00%	13.00%
Revenue Benchmark [Member] \| Customer C [Member]
Concentration Risk, Percentage	13.00%	14.00%	11.00%	12.00%
Accounts Receivable [Member]
Number of Major Customers	2				2
Accounts Receivable [Member] \| Customer A [Member]
Concentration Risk, Percentage	29.00%				17.00%
Accounts Receivable [Member] \| Customer B [Member]
Concentration Risk, Percentage	13.00%				11.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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