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

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Notes Tables
Notes Details

Note 10 - Leases (Details Textual)

v3.21.1

Note 10 - Leases (Details Textual)	3 Months Ended		6 Months Ended
Note 10 - Leases (Details Textual)	Mar. 31, 2021 USD ($) ft²	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) ft²	Mar. 31, 2020 USD ($)	Oct. 09, 2020 ft²	Feb. 12, 2020 ft²	Aug. 01, 2017	Jan. 01, 2015
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 120 days	4 years 284 days	3 years 120 days	4 years 284 days
Operating Lease, Weighted Average Discount Rate, Percent	3.40%	3.48%	3.40%	3.48%
Operating Lease, Payments \| $	$ 240,066	$ 168,815	$ 479,801	$ 336,655
7050 Winnetka Avenue North, Brooklyn Park, Minnesota [Member]
Area of Real Estate Property (Square Foot)	85,000		85,000
Lessee, Operating Lease, Term of Contract (Year)								10 years 62 days
Operating Lease Termination Fee \| $			$ 249,000
Tijuana, Mexico [Member]
Area of Real Estate Property (Square Foot)					46,000
Lessee, Operating Lease, Term of Contract (Year)					3 years		3 years
Tijuana, Mexico 2 [Member]
Area of Real Estate Property (Square Foot)						52,000
Lessee, Operating Lease, Term of Contract (Year)						3 years 180 days
Lessee, Operating Lease, Number of Options to Renew						2
Lessee, Operating Lease, Renewal Term (Year)						3 years

- Definition

Represents the number of options to renew an operating lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	clfd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of termination fee pursuant to the lease agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	clfd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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-Publisher FASB
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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