Clearfield, Inc. Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
Note 11 - Income Taxes (Details Textual) - USD ($)	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Tax Expense (Benefit), Total	$ 2,816,000	$ 935,000	$ 5,596,000	$ 1,619,000
Effective Income Tax Rate Reconciliation, Percent, Total	23.40%	20.40%	22.20%	19.20%
Unrecognized Tax Benefits, Ending Balance	$ 0		$ 0

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.