Clearfield (CLFD) 10-K 23 Nov 22 2022 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2022	Nov. 01, 2022	Mar. 31, 2022
Document Information [Line Items]
Entity Central Index Key	0000796505
Entity Registrant Name	Clearfield, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	0-16106
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-1347235
Entity Address, Address Line One	7050 Winnetka Avenue North Suite 100
Entity Address, City or Town	Brooklyn Park
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55428
City Area Code	763
Local Phone Number	476-6866
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CLFD
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 747,737,778
Entity Common Stock, Shares Outstanding		13,818,452
Auditor Firm ID	23
Auditor Name	Baker Tilly US, LLP
Auditor Location	Minneapolis, Minnesota

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2022	Sep. 30, 2021
Current Assets
Cash and cash equivalents	$ 16,650,000	$ 13,216,000
Short-term investments	5,802,000	10,374,000
Accounts receivables, net	53,704,000	19,438,000
Inventories, net	82,208,000	27,524,000
Other current assets	1,758,000	953,000
Total current assets	160,122,000	71,505,000
Property, plant and equipment, net	18,229,000	4,998,000
Other Assets
Long-term investments	22,747,000	36,913,000
Goodwill, Ending Balance	6,402,000	4,709,000
Intangible assets, net	6,376,000	4,696,000
Right of use lease assets	13,256,000	2,305,000
Deferred tax asset	1,414,000	365,000
Other	582,000	419,000
Total other assets	50,777,000	49,407,000
Total Assets	229,128,000	125,911,000
Current Liabilities
Current portion of lease liability	3,385,000	915,000
Accounts payable	24,118,000	9,215,000
Accrued compensation	13,619,000	8,729,000
Accrued expenses	6,181,000	1,613,000
Factoring liability	4,391,000	0
Total current liabilities	51,694,000	20,472,000
Other Liabilities
Long-term debt	18,666,000	0
Long-term portion of lease liability	10,412,000	1,615,000
Deferred tax liability	774,000	0
Total liabilities	81,546,000	22,087,000
Shareholders’ Equity
Preferred stock, $.01 par value; 500,000 shares; no shares issued or outstanding	0	0
Common stock, authorized 50,000,000, $.01 par value; 13,818,452 and 13,732,188 shares issued and outstanding as of September 30, 2022, and 2021	138,000	137,000
Additional paid-in capital	54,539,000	58,246,000
Accumulated other comprehensive loss	1,898,000	0
Retained earnings	94,803,000	45,441,000
Total shareholders’ equity	147,582,000	103,824,000
Total Liabilities and Shareholders’ Equity	$ 229,128,000	$ 125,911,000

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2022	Sep. 30, 2021
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	13,818,452	13,732,188
Common stock, shares outstanding (in shares)	13,818,452	13,732,188

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Net sales	$ 270,883	$ 140,755	$ 93,075
Cost of sales	157,936	79,578	55,160
Gross profit	112,947	61,177	37,915
Operating expenses
Selling, general and administrative	49,130	35,943	29,531
Income from operations	63,817	25,234	8,384
Net investment income	328	500	771
Interest expense	(311)	0	0
Income before income taxes	63,834	25,734	9,155
Income tax expense	14,472	5,407	1,862
Net income	$ 49,362	$ 20,327	$ 7,293
Net income per share Basic (in dollars per share)	$ 3.58	$ 1.48	$ 0.53
Net income per share Diluted (in dollars per share)	$ 3.55	$ 1.47	$ 0.53
Weighted average shares outstanding:
Basic (in shares)	13,771,665	13,720,699	13,643,355
Diluted (in shares)	13,905,984	13,784,294	13,643,355

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Net income	$ 49,362	$ 20,327	$ 7,293
Other comprehensive loss before income taxes:
Unrealized losses on available-for-sale investments	(1,590)	0	0
Unrealized loss on foreign currency translation	(854)	0	0
Total other comprehensive loss before income taxes	(2,444)	0	0
Income tax benefit	546	0	0
Total other comprehensive loss	(1,898)	0	0
Total comprehensive income	$ 47,464	$ 20,327	$ 7,293

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Sep. 30, 2019	13,642
Balance at Sep. 30, 2019	$ 136,000	$ 56,976,000	$ 0	$ 17,821,000	$ 74,933,000
Stock-based compensation expense	$ 0	774,000	0	0	774,000
Restricted stock issuance, net of forfeitures (in shares)	9
Restricted stock issuance, net of forfeitures	$ 0	0	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)	30
Issuance of common stock under employee stock purchase plan	$ 0	349,000	0	0	349,000
Exercise of stock options, net of shares exchanged for payment (in shares)	21
Exercise of stock options, net of shares exchanged for payment	$ 0	9,000	0	0	9,000
Repurchase of shares for payment of withholding taxes for vested restricted stock grants (in shares)	(10)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	$ 0	(176,000)	0	0	(176,000)
Net income	$ 0	0	0	7,293,000	7,293,000
Balance (in shares) at Sep. 30, 2020	13,650
Repurchase of common stock (in shares)	(42)
Repurchase of common stock	$ 0	(428,000)	0	0	(428,000)
Balance at Sep. 30, 2020	137,000	57,503,000	0	25,114,000	82,754,000
Stock-based compensation expense	$ 0	1,280	0	0	1,280
Restricted stock issuance, net of forfeitures (in shares)	36
Restricted stock issuance, net of forfeitures	$ 0	0	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)	24
Issuance of common stock under employee stock purchase plan	$ 0	383,000	0	0	383,000
Exercise of stock options, net of shares exchanged for payment (in shares)	34
Exercise of stock options, net of shares exchanged for payment	$ 0	(458,000)	0	0	(458,000)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants (in shares)	(12)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	$ 0	(462,000)	0	0	(462,000)
Net income	$ 0	0	0	20,327,000	20,327,000
Balance (in shares) at Sep. 30, 2021	13,732
Balance at Sep. 30, 2021	$ 137,000	58,246,000	0	45,441,000	103,824,000
Stock-based compensation expense	$ 0	2,339,000	0	0	2,339,000
Restricted stock issuance, net of forfeitures (in shares)	27
Restricted stock issuance, net of forfeitures	$ 0	0	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)	13
Issuance of common stock under employee stock purchase plan	$ 0	544,000	0	0	544,000
Exercise of stock options, net of shares exchanged for payment (in shares)	60
Exercise of stock options, net of shares exchanged for payment	$ 1,000	(5,184,000)	0	0	(5,183,000)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants (in shares)	(13)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	$ 0	(1,406,000)	0	0	(1,406,000)
Other comprehensive loss	0	0	(1,898,000)	0	(1,898,000)
Net income	$ 0	0	0	49,362,000	49,362,000
Balance (in shares) at Sep. 30, 2022	13,819
Balance at Sep. 30, 2022	$ 138,000	$ 54,539,000	$ (1,898,000)	$ 94,803,000	$ 147,582,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 49,362	$ 20,327	$ 7,293
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,413	2,302	2,422
Change in allowance for doubtful accounts	0	210	0
Amortization of discount on investments	(42)	(7)	(64)
Deferred taxes	(326)	(187)	(280)
Loss on disposal of assets	13	0	6
Stock-based compensation	2,339	1,280	774
Changes in operating assets and liabilities, net of acquired amounts:
Accounts receivable	(24,234)	(9,151)	(1,378)
Inventories, net	(43,744)	(13,116)	(5,396)
Other assets	(282)	(531)	128
Accounts payable and accrued expenses	14,502	9,776	3,152
Net cash provided by operating activities	1,001	10,903	6,656
Cash flows from investing activities
Purchases of property, plant and equipment and intangible assets	(9,148)	(2,046)	(1,806)
Purchases of investments	(248)	(24,809)	(34,057)
Proceeds from sales and maturities of investments	17,386	13,255	35,822
Business acquisition, net of cash acquired	(16,187)	0	0
Net cash used in investing activities	(8,197)	(13,600)	(41)
Cash flows from financing activities
Borrowing on line of credit	16,700	0	0
Proceeds from issuance of common stock under employee stock purchase plan	544	384	349
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	(1,406)	(462)	(176)
Withholding related to exercise of stock options	(5,183)	(458)	10
Repurchase of common stock	0	0	(429)
Net cash provided by (used in) financing activities	10,655	(536)	(247)
Effect of exchange rates on cash	(24)	0	0
Increase (decrease) in cash and cash equivalents	3,434	(3,233)	6,368
Cash and cash equivalents, beginning of year	13,216	16,450	10,082
Cash and cash equivalents, end of year	16,650	13,216	16,450
Supplemental disclosures for cash flow information
Cash paid during the year for income taxes	13,744	5,505	1,442
Cash paid for interest	119	0	0
Non-cash financing activities
Cashless exercise of stock options	$ 1,624	$ 1,271	$ 98

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business: July 26, 2022 11 We are engaged in global operations. Our operations currently comprise of two July 26, 2022, July 26, 2022, The Company’s products include fiber distribution systems, optical components, Outside Plant (“OSP”) cabinets, and fiber and copper cable assemblies that serve the communication service provider, including Fiber-to-the-Premises (“FTTP”), large enterprise, and original equipment manufacturer (“OEM”) markets. Principles of Consolidation Revenue Recognition: Cash and Cash Equivalents: three September 30, 2022, 2021 The Company maintains cash balances at multiple financial institutions, and at times, such balances exceed insured limits. The Company has not not Investments: not five second 2022, Foreign Currency Translation: Comprehensive Income: Fair Value of Financial Instruments: Accounts Receivable: not not The allowance for doubtful accounts activity for the years ended September 30, 2022, 2021 Year Ended Balance at Beginning of Year Additions (Recoveries) Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2022 $ 79,000 $ - $ - $ 79,000 September 30, 2021 $ 289,000 $ (210,000 ) $ - $ 79,000 Inventories: first first September 30, 2022 September 30, 2021 In thousands Raw materials $ 66,440 $ 23,072 Work-in-process 7,294 2,482 Finished goods 10,803 3,361 Inventories, gross 84,537 28,915 Inventory reserve (2,329 ) (1,391 ) Inventories, net $ 82,208 $ 27,524 On a regular basis, the Company reviews its inventory and identifies that which is excess, slow moving, and obsolete by considering factors such as inventory levels, expected product life, and forecasted sales demand. A reserve is established for any identified excess, slow moving, and obsolete inventory through a charge to cost of sales. Inventory write-down charges may not not Property, Plant and Equipment: Estimated useful lives of the assets are as follows: Years Equipment 3 15 Leasehold improvements 7-10 or life of lease Vehicles 3 Property, plant and equipment consist of the following: (In thousands) September 30, 2022 September 30, 2021 Manufacturing equipment $ 18,418 $ 9,179 Office equipment 4,174 2,901 Leasehold improvements 5,000 2,590 Vehicles 340 246 Construction in progress 1,715 150 Property, plant and equipment, gross 29,647 15,066 Less accumulated depreciation 11,418 10,068 Property, plant and equipment, net $ 18,229 $ 4,998 Depreciation expense for the years ended September 30, 2022, 2021, 2020 Goodwill and Intangible Assets: two fourth may not September 30, 2022, 2021 2020 no September 30, 2022, 2021 2020, no A significant reduction in our market capitalization or in the carrying amount of net assets of a reporting unit could result in an impairment charge. If the carrying amount of a reporting unit exceeds its fair value, the Company would measure the possible goodwill impairment loss based on an allocation of the estimate of fair value of the reporting unit to all of the underlying assets and liabilities of the reporting unit, including any previously unrecognized intangible assets. The excess of the fair value of a reporting unit over the amounts assigned to its assets and liabilities is the implied fair value of goodwill. An impairment loss is recognized to the extent that a reporting unit's recorded goodwill exceeds the implied fair value of goodwill. An impairment loss would be based on significant estimates and judgments, and if the facts and circumstances change, a potential impairment could have a material impact on the Company’s financial statements. No impairment of goodwill has occurred during the years ended September 30, 2022, 2021 2020, The Company capitalizes legal costs incurred to obtain patents. Once accepted by either the U.S. Patent Office or the equivalent office of a foreign country, these legal costs are amortized using the straight-line method over the remaining estimated lives, not September 30, 2022, In addition, the Company has various finite life intangible assets, most of which were acquired as a result of the acquisition of a portfolio of Telcordia certified outdoor active cabinet products from Calix, Inc. (“Calix”) during fiscal year 2018 July 26, 2022. 11 September 30, 2022, 2021 September 30, 2022 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 4,833 $ 1,273 $ 3,559 Certifications 8 584 133 451 Trademarks 8 10 1,306 586 720 Patents 20 931 118 813 Developed Technology 10 295 5 290 Other 5 6 6 - Software 1 3 2,452 1,909 543 Totals $ 10,407 $ 4,030 $ 6,376 September 30, 2021 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742 $ 904 $ 2,838 Certifications 8 1,068 484 584 Trademarks 8 563 255 308 Patents 20 790 85 706 Other 5 31 25 6 Software 1 3 1,960 1,705 255 Totals $ 8,154 $ 3,458 $ 4,696 Amortization expense related to these assets for the years ended September 30, 2022, 2021, 2020 Our future estimated amortization expense for intangibles is as follows as of September 30, 2022: (In thousands) Estimated amortization expense FY 2023 $ 865 FY 2024 786 FY 2025 685 FY 2026 470 FY 2027 394 Total $ 3,200 Impairment of Long-Lived Assets: may not not not Any required impairment loss is measured as the amount by which the carrying amount of a long-lived asset or asset group exceeds its fair value and is recorded as a reduction in the carrying value of the related asset or asset group and a charge to operating results. No impairment of long-lived assets occurred during the years ended September 30, 2022, 2021, 2020, Income Taxes: not not In accounting for uncertainty in income taxes, we recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not not 50 September 30, 2022, 2021, not not 12 Stock-Based Compensation not The expected terms of the options are based on evaluations of historical and expected future employee exercise behavior. The risk-free interest rate is based on the U.S. Treasury rates at the date of grant with maturity dates approximately equal to the expected life at grant date. Volatility is based on historical and expected future volatility of the Company’s stock. The Company has not not If factors change and we employ different assumptions in the determination of the fair value of grants in future periods, the related compensation expense that we record may Share Repurchase Program: January 27, 2022, April 2020 January 27, 2022, September 30, 2022, not September 30, 2022, not The Company is authorized to issue 50,000,000 shares of common stock at $.01 may, may Research and Development Costs September 30, 2022, 2021, 2020, Advertising Costs $436,000 September 30, 2022, 2021, 2020, Net Income Per Share: Weighted average common shares outstanding for the years ended September 30, 2022, 2021 2020 Year ended September 30, ( In thousands except share data 2022 2021 2020 Net income $ 49,362 $ 20,327 $ 7,293 Weighted average common shares 13,771,665 13,720,699 13,643,355 Dilutive potential common shares 134,319 63,593 - Weighted average dilutive common shares outstanding 13,905,984 13,784,294 13,643,355 Earnings per share: Basic 3.58 $ 1.48 $ 0.53 Diluted 3.55 $ 1.47 $ 0.53 There were no antidilutive shares for the years ended September 30, 2022 2021, September 30, 2020 Use of Estimates: may Reclassification: no New Accounting Pronouncements: In June 2016, 2016 13, Measurement of Credit Losses on Financial Instruments November 2018, 2018 19 2016 13. first 2023, 2016 13

Note 2 - Stock Based Compensati

Note 2 - Stock Based Compensation	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	NOTE 2 STOCK BASED COMPENSATION Stock-Based Compensation: The Company currently has one 2007 2007 September 30, 2022. September 30, 2022, September 30, 2022, 2021 2020 September 30, 2022, September 30, 2021, September 30, 2020, Stock Options: September 30, 2022, five three September 30, 2021, September 30, 2020, Year ended Year ended Year ended Dividend yield 0 % 0 % 0 % Weighted average expected volatility 52.02 % 46.90 % 39.5 –44.9 % Weighted average risk-free interest rate 0.97 % 0.24 % 0.24 1.69 % Weighted average expected life 5 years 5 years 4 - 6 years Vesting period 3 years 3 years 3 – 5 years The expected stock price volatility is based on the historical volatility of the Company’s stock for a period approximating the expected life. The expected life represents the period of time that options are expected to be outstanding after their grant date. The risk-free interest rate reflects the interest rate at grant date on zero Options are generally granted at fair market values determined on the date of grant and vesting normally occurs over a three five six September 30, 2022, September 30, 2021 September 30, 2020. September 30, 2022, September 30, 2021, September 30, 2020, September 30, 2022, 2021 2020 Option transactions under the 2007 September 30, 2022, 2021 2020 Number of Weighted average Weighted Outstanding as of September 30, 2019 290,750 $ 11.86 Granted 121,350 12.43 $ 4.62 Exercised (26,750 ) 4.01 Forfeited and expired (48,250 ) 13.35 Outstanding as of September 30, 2020 337,100 $ 12.48 Granted 105,089 23.74 $ 8.14 Exercised (101,966 ) 12.47 Forfeited and expired (38,709 ) 13.68 Outstanding as of September 30, 2021 301,514 $ 16.25 Granted 62,730 66.48 $ 25.54 Exercised (125,651 ) 12.92 Forfeited and expired (2,084 ) 19.94 Outstanding as of September 30, 2022 236,509 $ 31.30 The following table summarizes information concerning options exercisable under the 2007 Year ended Exercisable Weighted average Weighted Aggregate September 30, 2022 39,276 2.78 years $ 20.26 $ 3,314 September 30, 2021 51,201 2.29 years $ 12.28 $ 1,632 September 30, 2020 97,333 2.19 years $ 12.76 $ 721 The following table summarizes information concerning options currently outstanding at: Year Ended Number Weighted Weighted Aggregate September 30, 2022 236,509 3.3 years $ 31.30 $ 17,343 September 30, 2021 301,514 3.22 years $ 16.25 $ 8,412 September 30, 2020 337,100 3.43 years $ 12.48 $ 721 Restricted Stock: 2007 one ten Restricted stock transactions during the years ended September 30, 2022, 2021 2020 Number of Weighted average Unvested shares as of September 30, 2019 130,440 $ 13.25 Granted 19,455 10.30 Vested (29,950 ) 13.36 Forfeited (10,875 ) 12.14 Unvested shares as of September 30, 2020 109,070 $ 12.98 Granted 39,807 24.20 Vested (35,840 ) 12.48 Forfeited (4,198 ) 15.45 Unvested shares as of September 30, 2021 108,839 $ 17.14 Granted 29,512 65.90 Vested (37,094 ) 17.78 Forfeited (2,749 ) 16.84 Unvested shares as of September 30, 2022 98,508 $ 31.51 The fair value of restricted shares vested during the year end September 30, 2022, 2021 2020 September 30, 2022. September 30, 2021. September 30, 2020. Employee Stock Purchase Plan: 2010 may may no one six July 1 January 1 December 31, 2021 June 30, 2022, December 31, 2020 June 30, 2021, September 30, 2021, July 1, 2022. February 2020, June 30, 2022,

Note 3 - Investments

Note 3 - Investments	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Investment [Text Block]	NOTE 3 Investments The Company invests in CDs that are fully insured by the FDIC as well as U.S. Treasury and money market securities. Historically, the Company’s investment portfolio had been classified as held-to-maturity and recorded at amortized cost. During the second 2022, September 30, 2022 not September 30, 2021 2020. At September 30, 2022, September 30, 2022 (In thousands) Cost Unrealized Unrealized Fair Value Short-Term Certificates of deposit 5,945 - 143 5,802 Investment securities – short-term $ 5,945 $ - $ 143 $ 5,802 Long-Term U.S treasury securities $ 16,178 $ - $ 1,085 $ 15,093 Certificates of deposit 8,016 - 362 7,654 Investment securities – long-term $ 24,194 $ - $ 1,447 $ 22,747 At September 30, 2022, In Unrealized Loss Position For Less In Unrealized Loss Position For Greater (In thousands) Fair Value Gross Unrealized Fair Value Gross Unrealized U.S treasury securities $ - $ - $ 15,093 $ 1,085 Certificates of deposit 6,345 176 7,111 329 Investment securities $ 6,345 $ 176 $ 22,204 $ 1,414 As of September 30, 2022, September 30, 2022,

Note 4 - Fair Value Measurement

Note 4 - Fair Value Measurements	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 4 Fair Value Measurements The Company determines the fair value of its assets and liabilities based on the market price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company determines the fair value of U.S. treasury securities, and certificates of deposit based on valuations provided by an external pricing service, who obtains them from a variety of industry standard data providers. The Company’s investments are categorized according to the three one Level 1 Level 2 1, not Level 3 no 3 The following provides information regarding fair value measurements for our investment securities as of September 30, 2022 three Fair Value Measurements at September 30, 2022 ( In thousands Total Level 1 Level 2 Level 3 Investment securities: U.S treasury securities $ 15,093 $ - $ 15,093 $ - Certificates of deposit 13,456 - 13,456 - Total investment securities $ 28,549 $ - $ 28,549 $ - During the year ended September 30, 2022, 3 no Non-financial assets such as equipment and leasehold improvements, goodwill and intangible assets and right-of-use assets for operating leases are subject to non-recurring fair value measurements if they are deemed impaired. We had no September 30, 2022.

Note 5 - Other Comprehensive Lo

Note 5 - Other Comprehensive Loss	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	NOTE 5 Other Comprehensive Loss Changes in components of other comprehensive loss and taxes related to items of other comprehensive loss are as follows: Year ended September 30, 2022 ( In thousands Before Tax Tax Effect Net of Tax Unrealized losses on available-for-sale securities $ (1,590 ) $ 366 $ (1,224 ) Unrealized loss on foreign currency translation (854 ) 180 (674 ) Other comprehensive loss $ (2,444 ) $ 546 $ (1,898 ) The Company did not September 30, 2021, 2020.

Note 6 - Income Taxes

Note 6 - Income Taxes	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 6 INCOME TAXES Components of income tax expense are as follows for the years ended: September 30, September 30, September 30, ( In thousands 2022 2021 2020 Current: Federal $ 13,230 $ 5,154 $ 1,966 State 1,532 440 175 Foreign 48 - - Current income tax expense 14,810 5,594 2,142 Deferred: Federal (509 ) (234 ) (252 ) State 6 47 (26 ) Foreign 165 - - Deferred income tax expense (334 ) (187 ) (280 ) Income tax expense $ 14,472 $ 5,407 $ 1,862 The following is a reconciliation of the federal statutory income tax rate to the effective tax rate as a percent of pre-tax income for the following years ended: September 30, September 30, September 30, 2022 2021 2020 Federal statutory rate 21.0 % 21.0 % 21.0 % State income taxes 2.1 % 2.2 % 2.0 % Foreign income taxes 0.4 % - - Permanent differences 4.6 % - - Change in valuation allowance - - (0.5% ) Expiration and utilization of state NOL’s - - 0.4 % Research and development credits (0.5% ) (0.7% ) (2.5% ) Excess tax expense (benefits) from stock-based compensation (4.9% ) (1.5% ) (0.1% ) Effective Tax rate 22.7 % 21.0 % 20.3 % As of September 30, 2022 2021, As of September 30, 2022 2021, September 30, 2020 2021 September 30, 2022. September 30, 2022, September 30, 2021, not not 2031. Significant components of deferred income tax assets and liabilities are as follows at: September 30, September 30, (In thousands) 2022 2021 Deferred income tax assets (liabilities): Intangibles $ (102 ) $ (92 ) Property and equipment depreciation (1,068 ) (381 ) Net operating loss carry forwards and credits 256 300 Stock-based compensation 416 231 Inventories 813 519 Prepaid expenses (163 ) (48 ) Accrued expenses and reserves 1,020 519 Foreign currency translation 180 - Unrealized loss on investments 365 - Goodwill (1,077 ) (683 ) Net deferred tax asset $ 640 $ 365 Realization of NOL carryforwards and other deferred tax temporary differences are contingent upon future taxable earnings. The deferred tax assets and deferred tax liabilities are not September 30, 2022 2021, no not The Company is required to recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not not 50 no not September 30, 2022 2021. The Company is subject to income taxes in the U.S. federal and various state and foreign jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. Clearfield, Inc. is generally subject to U.S. federal examination for all tax years after 2017 2013 2018.

Note 7 - Concentrations

Note 7 - Concentrations	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	NOTE 7 CONCENTRATIONS Suppliers: third may may Customers: September 30, 2022, September 30, 2021 2020, two not As of September 30, 2022, September 30, 2021, Disaggregation of Revenue The following table presents our domestic and international sales for each of the last three Year Ended September 30, 2022 2021 2020 United States $ 255,607 $ 131,285 $ 89,022 All Other Countries 15,276 9,470 4,053 Total Net Sales $ 270,883 $ 140,755 $ 93,075 The Company sells its products to the Broadband Service Provider marketplace. In addition, the Company provides Legacy services for original equipment manufacturers requiring copper and fiber cable assemblies built to their specification.  The percentages of our sales by these markets were as follows for each of the last three Year Ended September 30, 2022 2021 2020 Broadband service providers 99 % 98 % 96 % Legacy customers 1 % 2 % 4 % Total Net Sales 100 % 100 % 100 % Broadband Service Providers are made up of Community Broadband, which includes local and regional telecom companies, utilities, municipalities and alternative carriers, also referred to as Tier 2 3 1’s, Long-lived assets: September 30, 2022 2021, September 30, 2022,

Note 8 - Employee Benefit Plan

Note 8 - Employee Benefit Plan	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Retirement Benefits [Text Block]	NOTE 8 EMPLOYEE BENEFIT PLAN Clearfield, Inc. maintains a contributory 401 may not first September 30, 2022, 2021 2020, . Nestor Cables is mandated by the Finnish government to participate in a pension and social expense plan to which Nestor and its employees make contributions. The plan is accounted for as defined contribution plan and Nestor Cables is responsible for an average of 17.45% of employees wages. Nestor’s contributions under this plan were $204,000 under the plan for the year ended September 30, 2022.

Note 9 - Leases

Note 9 - Leases	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	NOTE 9 LEASES Clearfield, Inc. leases an 85,000 square foot facility at 7050 ten two February 28, 2025 not not In July 2021, March 2022. two not not On November 19, 2021, five March 2022 February 28, 2027, five not not second 2022. Nestor leases an approximately 25,000 square foot manufacturing facility in Oulu, Finland, which is utilized for the operations of Nestor Cables. The original lease term ends on October 31, 2022, two not not January 1st Right-of-use lease assets and lease liabilities are recognized as of the commencement date based on the present value of the remaining lease payments over the lease term which includes renewal periods we are reasonably certain to exercise. Our leases do not Operating lease expense included within cost of sales and selling, general and administrative expense was as follows: (In thousands) Operating lease expense under ASC842 , Leases, Year ended Year ended Year ended Cost of sales $ 2,534 $ 999 905 Selling, general and administrative 277 217 221 Total lease expense $ 2,801 $ 1,216 1,126 Our future lease obligations for leases that have commenced were as follows as of September 30, 2022: (In thousands) Operating Leases FY 2023 $ 3,775 FY 2024 3,823 FY 2025 3,056 FY 2026 2,868 FY 2027 1,196 Thereafter - Total lease payments 14,718 Less: Interest (921 ) Present value of lease liabilities $ 13,797 As of September 30, 2022, September 30, 2021, September 30, 2022, 2021, 2020

Note 10 - Debt

Note 10 - Debt	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 10 DEBT On April 27, 2022, April 27, 2025 one not September 30, 2022, not 1 not 1 twelve 12 September 30, 2022, September 30, 2022, September 30, 2022. During March 2021, three March 31, 2024. September 30, 2022, The Company did not September 30, 2021.

Note 11 - Acquisition of Nestor

Note 11 - Acquisition of Nestor Cables	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Business Combination Disclosure [Text Block]	NOTE 11 ACQUISITION OF NESTOR CABLES On July 26, 2022, May 17, 2022. €7.9 €7.6 The following table summarizes the estimated fair value of the assets and liabilities acquired as of July 26, 2022: (in thousands Cash $ 72 Accounts receivables 10,562 Inventories 11,377 Other current assets 173 Total current assets 22,184 Property and equipment 7,689 Intangibles assets 1,840 Right of use lease asset 1,297 Goodwill 1,762 Other 55 Total assets $ 34,827 Accounts payable 5,839 Accrued compensation 1,430 Accrued expenses 1,916 Deferred tax liability 621 Lease liability 1,297 Factoring liability 5,849 Long term debt 2,045 Total liabilities $ 18,997 Net assets acquired $ 15,830 The Nestor acquisition resulted in approximately $1,700,000 of goodwill due to intangible assets not Nestor Cables acquired accounts receivable balance is the gross amount which is expected to be collected, which approximates fair value. As of the acquisition date no The intangible assets acquired include customer relationships, developed technology and trademarks. The remaining weighted average useful life of intangible assets acquired is 12.78 years as of the acquisition date. Refer to Note 1 The Company incurred approximately $1,600,000 in legal, professional, and other costs related to the acquisition which were accounted for as selling, general and administrative expenses when incurred. Refer to Note 12 September 30, 2022. The Company has a fiscal year end of September 30 December 31 not

Note 12 - Segment Reporting

Note 12 - Segment Reporting	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 12 SEGMENT REPORTING The Company’s reportable segments are based on the Company’s method of internal reporting. These results are not Upon closing of the acquisition of Nestor Cables, the Company reassessed its operating segments as defined under Accounting Standards Codification (“ASC”) 280, Segment Reporting 280, second July 26, 2022. For the year ended September 30, 2022, 1 2 July 26, 2022. 11 Financial results for the reportable segments are prepared on a basis consistent with the internal disaggregation of financial information to assist the CODM in making internal operating decisions. For consolidated reporting, the Company eliminates transactions between reportable segments. The following table summarizes the amounts between the two reportable segments year ended September 30, 2022. Year ended September 30, 2022 (in thousands Clearfield Nestor Consolidated Revenue from external customers $ 263,822 $ 7,061 $ 270,883 Revenue from internal customers (Clearfield, Inc.) - 182 182 Net investment income 327 1 328 Interest Expense 141 170 311 Depreciation and amortization 3,174 239 3,413 Stock based compensation 2,339 - 2,339 Income taxes 14,258 214 14,472 Net Income (loss) 49,771 (409 ) 49,362 Capital Expenditures 8,487 13 8,500 Goodwill 4,709 1,693 6,402 Total Assets $ 198,255 $ 30,873 $ 229,128

Note 13 - Financing Receivables

Note 13 - Financing Receivables	12 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Financing Receivables [Text Block]	NOTE 13 FINANCING RECEIVABLES Nestor Cables factors certain of its accounts receivable, with recourse provisions that is accounted for as a secured borrowing. Nestor Cables has a total factoring liability of $4,391,000 as of September 30, 2022. €12.5 not 3 .75% September 30, 2022, zero one

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation
Revenue [Policy Text Block]	Revenue Recognition:
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents: three September 30, 2022, 2021 The Company maintains cash balances at multiple financial institutions, and at times, such balances exceed insured limits. The Company has not not
Investment, Policy [Policy Text Block]	Investments: not five second 2022,
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Translation:
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income:
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments:
Accounts Receivable [Policy Text Block]	Accounts Receivable: not not The allowance for doubtful accounts activity for the years ended September 30, 2022, 2021 Year Ended Balance at Beginning of Year Additions (Recoveries) Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2022 $ 79,000 $ - $ - $ 79,000 September 30, 2021 $ 289,000 $ (210,000 ) $ - $ 79,000
Inventory, Policy [Policy Text Block]	Inventories: first first September 30, 2022 September 30, 2021 In thousands Raw materials $ 66,440 $ 23,072 Work-in-process 7,294 2,482 Finished goods 10,803 3,361 Inventories, gross 84,537 28,915 Inventory reserve (2,329 ) (1,391 ) Inventories, net $ 82,208 $ 27,524 On a regular basis, the Company reviews its inventory and identifies that which is excess, slow moving, and obsolete by considering factors such as inventory levels, expected product life, and forecasted sales demand. A reserve is established for any identified excess, slow moving, and obsolete inventory through a charge to cost of sales. Inventory write-down charges may not not
Property, Plant and Equipment, Policy [Policy Text Block]	Property, Plant and Equipment: Estimated useful lives of the assets are as follows: Years Equipment 3 15 Leasehold improvements 7-10 or life of lease Vehicles 3 Property, plant and equipment consist of the following: (In thousands) September 30, 2022 September 30, 2021 Manufacturing equipment $ 18,418 $ 9,179 Office equipment 4,174 2,901 Leasehold improvements 5,000 2,590 Vehicles 340 246 Construction in progress 1,715 150 Property, plant and equipment, gross 29,647 15,066 Less accumulated depreciation 11,418 10,068 Property, plant and equipment, net $ 18,229 $ 4,998 Depreciation expense for the years ended September 30, 2022, 2021, 2020
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets: two fourth may not September 30, 2022, 2021 2020 no September 30, 2022, 2021 2020, no A significant reduction in our market capitalization or in the carrying amount of net assets of a reporting unit could result in an impairment charge. If the carrying amount of a reporting unit exceeds its fair value, the Company would measure the possible goodwill impairment loss based on an allocation of the estimate of fair value of the reporting unit to all of the underlying assets and liabilities of the reporting unit, including any previously unrecognized intangible assets. The excess of the fair value of a reporting unit over the amounts assigned to its assets and liabilities is the implied fair value of goodwill. An impairment loss is recognized to the extent that a reporting unit's recorded goodwill exceeds the implied fair value of goodwill. An impairment loss would be based on significant estimates and judgments, and if the facts and circumstances change, a potential impairment could have a material impact on the Company’s financial statements. No impairment of goodwill has occurred during the years ended September 30, 2022, 2021 2020, The Company capitalizes legal costs incurred to obtain patents. Once accepted by either the U.S. Patent Office or the equivalent office of a foreign country, these legal costs are amortized using the straight-line method over the remaining estimated lives, not September 30, 2022, In addition, the Company has various finite life intangible assets, most of which were acquired as a result of the acquisition of a portfolio of Telcordia certified outdoor active cabinet products from Calix, Inc. (“Calix”) during fiscal year 2018 July 26, 2022. 11 September 30, 2022, 2021 September 30, 2022 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 4,833 $ 1,273 $ 3,559 Certifications 8 584 133 451 Trademarks 8 10 1,306 586 720 Patents 20 931 118 813 Developed Technology 10 295 5 290 Other 5 6 6 - Software 1 3 2,452 1,909 543 Totals $ 10,407 $ 4,030 $ 6,376 September 30, 2021 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742 $ 904 $ 2,838 Certifications 8 1,068 484 584 Trademarks 8 563 255 308 Patents 20 790 85 706 Other 5 31 25 6 Software 1 3 1,960 1,705 255 Totals $ 8,154 $ 3,458 $ 4,696 Amortization expense related to these assets for the years ended September 30, 2022, 2021, 2020 Our future estimated amortization expense for intangibles is as follows as of September 30, 2022: (In thousands) Estimated amortization expense FY 2023 $ 865 FY 2024 786 FY 2025 685 FY 2026 470 FY 2027 394 Total $ 3,200
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets: may not not not Any required impairment loss is measured as the amount by which the carrying amount of a long-lived asset or asset group exceeds its fair value and is recorded as a reduction in the carrying value of the related asset or asset group and a charge to operating results. No impairment of long-lived assets occurred during the years ended September 30, 2022, 2021, 2020,
Income Tax, Policy [Policy Text Block]	Income Taxes: not not In accounting for uncertainty in income taxes, we recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not not 50 September 30, 2022, 2021, not not 12
Share-Based Payment Arrangement [Policy Text Block]	Stock-Based Compensation not The expected terms of the options are based on evaluations of historical and expected future employee exercise behavior. The risk-free interest rate is based on the U.S. Treasury rates at the date of grant with maturity dates approximately equal to the expected life at grant date. Volatility is based on historical and expected future volatility of the Company’s stock. The Company has not not If factors change and we employ different assumptions in the determination of the fair value of grants in future periods, the related compensation expense that we record may
Share Repurchase Program [Policy Text Block]	Share Repurchase Program: January 27, 2022, April 2020 January 27, 2022, September 30, 2022, not September 30, 2022, not The Company is authorized to issue 50,000,000 shares of common stock at $.01 may, may
Research and Development Expense, Policy [Policy Text Block]	Research and Development Costs September 30, 2022, 2021, 2020,
Advertising Cost [Policy Text Block]	Advertising Costs $436,000 September 30, 2022, 2021, 2020,
Earnings Per Share, Policy [Policy Text Block]	Net Income Per Share: Weighted average common shares outstanding for the years ended September 30, 2022, 2021 2020 Year ended September 30, ( In thousands except share data 2022 2021 2020 Net income $ 49,362 $ 20,327 $ 7,293 Weighted average common shares 13,771,665 13,720,699 13,643,355 Dilutive potential common shares 134,319 63,593 - Weighted average dilutive common shares outstanding 13,905,984 13,784,294 13,643,355 Earnings per share: Basic 3.58 $ 1.48 $ 0.53 Diluted 3.55 $ 1.47 $ 0.53 There were no antidilutive shares for the years ended September 30, 2022 2021, September 30, 2020
Use of Estimates, Policy [Policy Text Block]	Use of Estimates: may
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassification: no
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements: In June 2016, 2016 13, Measurement of Credit Losses on Financial Instruments November 2018, 2018 19 2016 13. first 2023, 2016 13

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Year Ended Balance at Beginning of Year Additions (Recoveries) Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2022 $ 79,000 $ - $ - $ 79,000 September 30, 2021 $ 289,000 $ (210,000 ) $ - $ 79,000
Schedule of Inventory, Current [Table Text Block]	September 30, 2022 September 30, 2021 In thousands Raw materials $ 66,440 $ 23,072 Work-in-process 7,294 2,482 Finished goods 10,803 3,361 Inventories, gross 84,537 28,915 Inventory reserve (2,329 ) (1,391 ) Inventories, net $ 82,208 $ 27,524
Property, Plant and Equipment [Table Text Block]	(In thousands) September 30, 2022 September 30, 2021 Manufacturing equipment $ 18,418 $ 9,179 Office equipment 4,174 2,901 Leasehold improvements 5,000 2,590 Vehicles 340 246 Construction in progress 1,715 150 Property, plant and equipment, gross 29,647 15,066 Less accumulated depreciation 11,418 10,068 Property, plant and equipment, net $ 18,229 $ 4,998
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2022 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 4,833 $ 1,273 $ 3,559 Certifications 8 584 133 451 Trademarks 8 10 1,306 586 720 Patents 20 931 118 813 Developed Technology 10 295 5 290 Other 5 6 6 - Software 1 3 2,452 1,909 543 Totals $ 10,407 $ 4,030 $ 6,376 September 30, 2021 (In thousands) Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742 $ 904 $ 2,838 Certifications 8 1,068 484 584 Trademarks 8 563 255 308 Patents 20 790 85 706 Other 5 31 25 6 Software 1 3 1,960 1,705 255 Totals $ 8,154 $ 3,458 $ 4,696
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(In thousands) Estimated amortization expense FY 2023 $ 865 FY 2024 786 FY 2025 685 FY 2026 470 FY 2027 394 Total $ 3,200
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year ended September 30, ( In thousands except share data 2022 2021 2020 Net income $ 49,362 $ 20,327 $ 7,293 Weighted average common shares 13,771,665 13,720,699 13,643,355 Dilutive potential common shares 134,319 63,593 - Weighted average dilutive common shares outstanding 13,905,984 13,784,294 13,643,355 Earnings per share: Basic 3.58 $ 1.48 $ 0.53 Diluted 3.55 $ 1.47 $ 0.53
Useful Lives [Member]
Notes Tables
Property, Plant and Equipment [Table Text Block]	Years Equipment 3 15 Leasehold improvements 7-10 or life of lease Vehicles 3

Note 2 - Stock Based Compensa_2

Note 2 - Stock Based Compensation (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Year ended Year ended Year ended Dividend yield 0 % 0 % 0 % Weighted average expected volatility 52.02 % 46.90 % 39.5 –44.9 % Weighted average risk-free interest rate 0.97 % 0.24 % 0.24 1.69 % Weighted average expected life 5 years 5 years 4 - 6 years Vesting period 3 years 3 years 3 – 5 years
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Number of Weighted average Weighted Outstanding as of September 30, 2019 290,750 $ 11.86 Granted 121,350 12.43 $ 4.62 Exercised (26,750 ) 4.01 Forfeited and expired (48,250 ) 13.35 Outstanding as of September 30, 2020 337,100 $ 12.48 Granted 105,089 23.74 $ 8.14 Exercised (101,966 ) 12.47 Forfeited and expired (38,709 ) 13.68 Outstanding as of September 30, 2021 301,514 $ 16.25 Granted 62,730 66.48 $ 25.54 Exercised (125,651 ) 12.92 Forfeited and expired (2,084 ) 19.94 Outstanding as of September 30, 2022 236,509 $ 31.30
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]	Year ended Exercisable Weighted average Weighted Aggregate September 30, 2022 39,276 2.78 years $ 20.26 $ 3,314 September 30, 2021 51,201 2.29 years $ 12.28 $ 1,632 September 30, 2020 97,333 2.19 years $ 12.76 $ 721
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]	Year Ended Number Weighted Weighted Aggregate September 30, 2022 236,509 3.3 years $ 31.30 $ 17,343 September 30, 2021 301,514 3.22 years $ 16.25 $ 8,412 September 30, 2020 337,100 3.43 years $ 12.48 $ 721
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Number of Weighted average Unvested shares as of September 30, 2019 130,440 $ 13.25 Granted 19,455 10.30 Vested (29,950 ) 13.36 Forfeited (10,875 ) 12.14 Unvested shares as of September 30, 2020 109,070 $ 12.98 Granted 39,807 24.20 Vested (35,840 ) 12.48 Forfeited (4,198 ) 15.45 Unvested shares as of September 30, 2021 108,839 $ 17.14 Granted 29,512 65.90 Vested (37,094 ) 17.78 Forfeited (2,749 ) 16.84 Unvested shares as of September 30, 2022 98,508 $ 31.51

Note 3 - Investments (Tables)

Note 3 - Investments (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]	September 30, 2022 (In thousands) Cost Unrealized Unrealized Fair Value Short-Term Certificates of deposit 5,945 - 143 5,802 Investment securities – short-term $ 5,945 $ - $ 143 $ 5,802 Long-Term U.S treasury securities $ 16,178 $ - $ 1,085 $ 15,093 Certificates of deposit 8,016 - 362 7,654 Investment securities – long-term $ 24,194 $ - $ 1,447 $ 22,747
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]	In Unrealized Loss Position For Less In Unrealized Loss Position For Greater (In thousands) Fair Value Gross Unrealized Fair Value Gross Unrealized U.S treasury securities $ - $ - $ 15,093 $ 1,085 Certificates of deposit 6,345 176 7,111 329 Investment securities $ 6,345 $ 176 $ 22,204 $ 1,414

Note 4 - Fair Value Measureme_2

Note 4 - Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	Fair Value Measurements at September 30, 2022 ( In thousands Total Level 1 Level 2 Level 3 Investment securities: U.S treasury securities $ 15,093 $ - $ 15,093 $ - Certificates of deposit 13,456 - 13,456 - Total investment securities $ 28,549 $ - $ 28,549 $ -

Note 5 - Other Comprehensive _2

Note 5 - Other Comprehensive Loss (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Year ended September 30, 2022 ( In thousands Before Tax Tax Effect Net of Tax Unrealized losses on available-for-sale securities $ (1,590 ) $ 366 $ (1,224 ) Unrealized loss on foreign currency translation (854 ) 180 (674 ) Other comprehensive loss $ (2,444 ) $ 546 $ (1,898 )

Note 6 - Income Taxes (Tables)

Note 6 - Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	September 30, September 30, September 30, ( In thousands 2022 2021 2020 Current: Federal $ 13,230 $ 5,154 $ 1,966 State 1,532 440 175 Foreign 48 - - Current income tax expense 14,810 5,594 2,142 Deferred: Federal (509 ) (234 ) (252 ) State 6 47 (26 ) Foreign 165 - - Deferred income tax expense (334 ) (187 ) (280 ) Income tax expense $ 14,472 $ 5,407 $ 1,862
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	September 30, September 30, September 30, 2022 2021 2020 Federal statutory rate 21.0 % 21.0 % 21.0 % State income taxes 2.1 % 2.2 % 2.0 % Foreign income taxes 0.4 % - - Permanent differences 4.6 % - - Change in valuation allowance - - (0.5% ) Expiration and utilization of state NOL’s - - 0.4 % Research and development credits (0.5% ) (0.7% ) (2.5% ) Excess tax expense (benefits) from stock-based compensation (4.9% ) (1.5% ) (0.1% ) Effective Tax rate 22.7 % 21.0 % 20.3 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	September 30, September 30, (In thousands) 2022 2021 Deferred income tax assets (liabilities): Intangibles $ (102 ) $ (92 ) Property and equipment depreciation (1,068 ) (381 ) Net operating loss carry forwards and credits 256 300 Stock-based compensation 416 231 Inventories 813 519 Prepaid expenses (163 ) (48 ) Accrued expenses and reserves 1,020 519 Foreign currency translation 180 - Unrealized loss on investments 365 - Goodwill (1,077 ) (683 ) Net deferred tax asset $ 640 $ 365

Note 7 - Concentrations (Tables

Note 7 - Concentrations (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended September 30, 2022 2021 2020 United States $ 255,607 $ 131,285 $ 89,022 All Other Countries 15,276 9,470 4,053 Total Net Sales $ 270,883 $ 140,755 $ 93,075 Year Ended September 30, 2022 2021 2020 Broadband service providers 99 % 98 % 96 % Legacy customers 1 % 2 % 4 % Total Net Sales 100 % 100 % 100 %

Note 9 - Leases (Tables)

Note 9 - Leases (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Lessee, Operating Lease Expense [Table Text Block]	(In thousands) Operating lease expense under ASC842 , Leases, Year ended Year ended Year ended Cost of sales $ 2,534 $ 999 905 Selling, general and administrative 277 217 221 Total lease expense $ 2,801 $ 1,216 1,126
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	(In thousands) Operating Leases FY 2023 $ 3,775 FY 2024 3,823 FY 2025 3,056 FY 2026 2,868 FY 2027 1,196 Thereafter - Total lease payments 14,718 Less: Interest (921 ) Present value of lease liabilities $ 13,797

Note 11 - Acquisition of Nest_2

Note 11 - Acquisition of Nestor Cables (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(in thousands Cash $ 72 Accounts receivables 10,562 Inventories 11,377 Other current assets 173 Total current assets 22,184 Property and equipment 7,689 Intangibles assets 1,840 Right of use lease asset 1,297 Goodwill 1,762 Other 55 Total assets $ 34,827 Accounts payable 5,839 Accrued compensation 1,430 Accrued expenses 1,916 Deferred tax liability 621 Lease liability 1,297 Factoring liability 5,849 Long term debt 2,045 Total liabilities $ 18,997 Net assets acquired $ 15,830

Note 12 - Segment Reporting (Ta

Note 12 - Segment Reporting (Tables)	12 Months Ended
	Sep. 30, 2022
Notes Tables
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Year ended September 30, 2022 (in thousands Clearfield Nestor Consolidated Revenue from external customers $ 263,822 $ 7,061 $ 270,883 Revenue from internal customers (Clearfield, Inc.) - 182 182 Net investment income 327 1 328 Interest Expense 141 170 311 Depreciation and amortization 3,174 239 3,413 Stock based compensation 2,339 - 2,339 Income taxes 14,258 214 14,472 Net Income (loss) 49,771 (409 ) 49,362 Capital Expenditures 8,487 13 8,500 Goodwill 4,709 1,693 6,402 Total Assets $ 198,255 $ 30,873 $ 229,128

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual)		12 Months Ended
	Jan. 27, 2022 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Apr. 25, 2017 USD ($)
Depreciation, Total | $		$ 2,647,000	$ 1,699,000	$ 1,944,000
Goodwill, Impairment Loss | $		$ 0	0	0
Number of Patents Granted		36
Amortization of Intangible Assets | $		$ 766,000	602,000	478,000
Impairment, Long-Lived Asset, Held-for-Use, Total | $		0	0	0
Unrecognized Tax Benefits, Ending Balance | $		0	$ 0	$ 0
Stock Repurchase Program, Increase in Authorized Amount | $	$ 10,000,000
Stock Repurchase Program, Authorized Amount | $	$ 22,000,000	$ 22,000,000			$ 12,000,000
Stock Repurchased, Cumulative (in shares)		565,590
Stock Repurchased, Value, Cumulative | $		$ 7,019,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $		$ 14,981,000
Stock Repurchased During Period, Shares (in shares)		13,292	11,754	10,038
Common Stock, Shares Authorized (in shares)		50,000,000	50,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)		500,000	500,000
Preferred Stock, Shares Issued (in shares)		0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		0	0
Research and Development Expense, Total | $		$ 895,000	$ 1,243,000	$ 1,267,000
Advertising Expense | $		$ 537,000	$ 436,000	$ 297,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		0		337,100
Undesignated Shares [Member]
Preferred Stock, Shares Authorized (in shares)		5,000,000
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)		500,000
Preferred Stock, Shares Issued (in shares)		0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		0
Share Repurchase Program [Member]
Stock Repurchased During Period, Shares (in shares)		0
Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		20 years	20 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		20 years

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Balance at Beginning of Year	$ 79,000	$ 289,000
Additions Charged to Costs and Expenses	0	(210,000)
Less Write-offs	0	0
Balance at End of Year	$ 79,000	$ 79,000

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Components of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Raw materials	$ 66,440	$ 23,072
Work-in-process	7,294	2,482
Finished goods	10,803	3,361
Inventories, gross	84,537	28,915
Inventory reserve	(2,329)	(1,391)
Inventories, net	$ 82,208	$ 27,524

Note 1 - Summary of Significa_6

Note 1 - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	12 Months Ended
	Sep. 30, 2022
Equipment [Member] | Minimum [Member]
Property, plant and equipment useful life (Year)	3 years
Equipment [Member] | Maximum [Member]
Property, plant and equipment useful life (Year)	15 years
Vehicles [Member]
Property, plant and equipment useful life (Year)	3 years

Note 1 - Summary of Significa_7

Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Fixed Assets	$ 29,647	$ 15,066
Less accumulated depreciation	11,418	10,068
Property, plant and equipment, net	18,229	4,998
Machinery and Equipment [Member]
Fixed Assets	18,418	9,179
Office Equipment [Member]
Fixed Assets	4,174	2,901
Leasehold Improvements [Member]
Fixed Assets	5,000	2,590
Vehicles [Member]
Fixed Assets	340	246
Construction in Progress [Member]
Fixed Assets	$ 1,715	$ 150

Note 1 - Summary of Significa_8

Note 1 - Summary of Significant Accounting Policies - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accumulated amortization	$ 4,030	$ 3,458
Net book value amount	6,376	4,696
Gross carrying amount	$ 10,407	$ 8,154
Customer Relationships [Member]
Useful life (Year)	15 years	15 years
Accumulated amortization	$ 1,273	$ 904
Net book value amount	$ 3,559	2,838
Gross carrying amount		$ 3,742
Certification Marks [Member]
Useful life (Year)	8 years	8 years
Accumulated amortization	$ 133	$ 484
Net book value amount	451	584
Gross carrying amount	584	$ 1,068
Trademarks [Member]
Useful life (Year)		8 years
Accumulated amortization	586	$ 255
Net book value amount	720	308
Gross carrying amount	$ 1,306	$ 563
Trademarks [Member] | Minimum [Member]
Useful life (Year)	8 years
Trademarks [Member] | Maximum [Member]
Useful life (Year)	10 years
Patents [Member]
Useful life (Year)	20 years	20 years
Accumulated amortization	$ 118	$ 85
Net book value amount	813	706
Gross carrying amount	$ 931	$ 790
Patents [Member] | Maximum [Member]
Useful life (Year)	20 years
Developed Technology Rights [Member]
Useful life (Year)	10 years
Accumulated amortization	$ 5
Net book value amount	290
Gross carrying amount	$ 295
Other Intangible Assets [Member]
Useful life (Year)	5 years	5 years
Accumulated amortization	$ 6	$ 25
Net book value amount	0	6
Gross carrying amount	6	31
Computer Software, Intangible Asset [Member]
Accumulated amortization	1,909	1,705
Net book value amount	543	255
Gross carrying amount	$ 2,452	$ 1,960
Computer Software, Intangible Asset [Member] | Minimum [Member]
Useful life (Year)	1 year	1 year
Computer Software, Intangible Asset [Member] | Maximum [Member]
Useful life (Year)	3 years	3 years

Note 1 - Summary of Significa_9

Note 1 - Summary of Significant Accounting Policies - Future Estimated Amortization Expense for Intangibles (Details) $ in Thousands	Sep. 30, 2022 USD ($)
FY 2023	$ 865
FY 2024	786
FY 2025	685
FY 2026	470
FY 2027	394
Total	$ 3,200

Note 1 - Summary of Signific_10

Note 1 - Summary of Significant Accounting Policies - Weighted Average Common Shares Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Net income	$ 49,362	$ 20,327	$ 7,293
Weighted average common shares (in shares)	13,771,665	13,720,699	13,643,355
Dilutive potential common shares (in shares)	134,319	63,593	0
Weighted average dilutive common shares outstanding (in shares)	13,905,984	13,784,294	13,643,355
Earnings per share:
Basic (in dollars per share)	$ 3.58	$ 1.48	$ 0.53
Diluted (in dollars per share)	$ 3.55	$ 1.47	$ 0.53

Note 2 - Stock Based Compensa_3

Note 2 - Stock Based Compensation (Details Textual) - USD ($)	1 Months Ended	6 Months Ended				12 Months Ended
	Feb. 29, 2020	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)						580,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total						$ 3,664,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						2 years 1 month 6 days
Share-Based Payment Arrangement, Expense						$ 2,339,000	$ 1,280,000	$ 774,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)						62,730	105,089	121,350
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)						5 years	5 years	5 years 8 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years	3 years	4 years 8 months 15 days
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)						$ 66.48	$ 23.74	$ 12.43
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number (in shares)						113,727	79,833	44,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)						125,651	101,966	26,750
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value						$ 11,279,000	$ 1,315,000	$ 332,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value						$ 3,744,000	$ 1,364,000	$ 497,000
Stock Repurchased During Period, Shares (in shares)						13,292	11,754	10,038
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)						$ 105.78	$ 39.32	$ 17.57
Payment, Tax Withholding, Share-Based Payment Arrangement						$ 1,406,000	$ 462,000	$ 176,000
Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)		181,590
Share-based Compensation Arrangement by Share-based Payment Award, Market Price Percentage, Offering Date						85%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)		5,605	7,678	9,739	15,011
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price (in dollars per share)		$ 52.66	$ 32.43	$ 21.01	$ 11.93
Payment, Tax Withholding, Share-Based Payment Arrangement							$ 191,352
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)	200,000
Share-Based Payment Arrangement, Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years
Share-Based Payment Arrangement, Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)						6 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						5 years
Cashless Method Stock Option Exercised [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)						125,651	101,966	14,688
Restricted Stock [Member] | Minimum [Member] | Employees [Member] | Stock Compensation Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						1 year
Restricted Stock [Member] | Maximum [Member] | Employees [Member] | Stock Compensation Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						10 years
Selling, General and Administrative Expenses [Member]
Share-Based Payment Arrangement, Expense						$ 2,213,000	$ 1,223,000	$ 752,000
Cost of Sales [Member]
Share-Based Payment Arrangement, Expense						$ 126,000	$ 57,000	$ 22,000

Note 2 - Stock Based Compensa_4

Note 2 - Stock Based Compensation - Valuation Assumptions (Details)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Dividend yield	0%	0%	0%
Weighted average expected volatility	52.02%	46.90%
Weighted average risk-free interest rate	0.97%	0.24%
Weighted average expected life (Year)	5 years	5 years
Vesting period (Year)	3 years	3 years	4 years 8 months 15 days
Minimum [Member]
Weighted average risk-free interest rate			0.24%
Maximum [Member]
Weighted average risk-free interest rate			1.69%

Note 2 - Stock Based Compensa_5

Note 2 - Stock Based Compensation - Option Transaction Summary (Details) - $ / shares	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Options, outstanding (in shares)	301,514	337,100	290,750
Weighted-average exercise price, outstanding (in dollars per share)	$ 16.25	$ 12.48	$ 11.86
Granted (in shares)	62,730	105,089	121,350
Weighted-average exercise price, Granted (in dollars per share)	$ 66.48	$ 23.74	$ 12.43
Weighted-average fair value, Granted (in dollars per share)	$ 25.54	$ 8.14	$ 4.62
Exercised (in shares)	(125,651)	(101,966)	(26,750)
Weighted-average exercise price, Exercised (in dollars per share)	$ 12.92	$ 12.47	$ 4.01
Forfeited and expired (in shares)	(2,084)	(38,709)	(48,250)
Weighted-average exercise price, Forfeited or Expired (in dollars per share)	$ 19.94	$ 13.68	$ 13.35
Options, outstanding (in shares)	236,509	301,514	337,100
Weighted-average exercise price, outstanding (in dollars per share)	$ 31.30	$ 16.25	$ 12.48

Note 2 - Stock Based Compensa_6

Note 2 - Stock Based Compensation - Options Exercisable (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Exercisable (in shares)	39,276	51,201	97,333
Weighted average remaining contractual life (Year)	2 years 9 months 10 days	2 years 3 months 14 days	2 years 2 months 8 days
Weighted average exercise price (in dollars per share)	$ 20.26	$ 12.28	$ 12.76
Aggregate intrinsic value	$ 3,314	$ 1,632	$ 721

Note 2 - Stock Based Compensa_7

Note 2 - Stock Based Compensation - Options Currently Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Number outstanding (in shares)	236,509	301,514	337,100	290,750
Weighted average remaining contractual life (Year)	3 years 3 months 18 days	3 years 2 months 19 days	3 years 5 months 4 days
Weighted average exercise price (in dollars per share)	$ 31.30	$ 16.25	$ 12.48	$ 11.86
Aggregate intrinsic value	$ 17,343	$ 8,412	$ 721

Note 2 - Stock Based Compensa_8

Note 2 - Stock Based Compensation - Restricted Stock Transactions (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Balance, unvested shares (in shares)	108,839	109,070	130,440
Balance, weighted-average grant date fair value (in dollars per share)	$ 17.14	$ 12.98	$ 13.25
Granted, unvested shares (in shares)	29,512	39,807	19,455
Granted, weighted-average grant date fair value (in dollars per share)	$ 65.90	$ 24.20	$ 10.30
Vested, unvested shares (in shares)	(37,094)	(35,840)	(29,950)
Vested, weighted-average grant date fair value (in dollars per share)	$ 17.78	$ 12.48	$ 13.36
Forfeited, unvested shares (in shares)	(2,749)	(4,198)	(10,875)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 16.84	$ 15.45	$ 12.14
Balance, unvested shares (in shares)	98,508	108,839	109,070
Balance, weighted-average grant date fair value (in dollars per share)	$ 31.51	$ 17.14	$ 12.98

Note 3 - Investments (Details T

Note 3 - Investments (Details Textual)	12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Proceeds from Sale, Maturity and Collection of Investments, Total	$ 14,365,000	$ 0	$ 0
debt Securities, Realized Gain	92,000
Debt Securities, Realized Loss	$ 53,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	62
Debt Securities, Available for Sale, Other than Temporary Impairment	$ 0

Note 3 - Investments - Availabl

Note 3 - Investments - Available-for-sale Investments (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Fair value	$ 28,549
Short-term Investment [Member]
Gross unrealized gains	0
Gross unrealized losses	143
Long-term Investment [Member]
Gross unrealized gains	0
Gross unrealized losses	1,447
Short-term Certificates of Deposit [Member]
Amortized cost	5,945
Gross unrealized gains	0
Gross unrealized losses	143
Fair value	5,802
Short-term Investment [Member]
Amortized cost	5,945
Fair value	5,802
US Treasury Securities [Member]
Amortized cost	16,178
Gross unrealized gains	0
Gross unrealized losses	1,085
Fair value	15,093
Long-term Certificates of Deposit [Member]
Amortized cost	8,016
Gross unrealized gains	0
Gross unrealized losses	362
Fair value	7,654
Long-term Investment [Member]
Amortized cost	24,194
Fair value	$ 22,747

Note 3 - Investments - Securiti

Note 3 - Investments - Securities in a Continuous Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Less than 12 months, fair value	$ 6,345
Less than 12 months, gross unrealized losses	176
12 months or greater, fair value	22,204
12 months or greater, gross unrealized losses	1,414
US Treasury Securities [Member]
Less than 12 months, fair value	0
Less than 12 months, gross unrealized losses	0
12 months or greater, fair value	15,093
12 months or greater, gross unrealized losses	1,085
Certificates of Deposit [Member]
Less than 12 months, fair value	6,345
Less than 12 months, gross unrealized losses	176
12 months or greater, fair value	7,111
12 months or greater, gross unrealized losses	$ 329

Note 4 - Fair Value Measureme_3

Note 4 - Fair Value Measurements (Details Textual) $ in Thousands	Sep. 30, 2022 USD ($)
Debt Securities, Available-for-Sale, Total	$ 28,549
Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	$ 0

Note 4 - Fair Value Measureme_4

Note 4 - Fair Value Measurements - Fair Value Measurements (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Fair value	$ 28,549
Fair Value, Inputs, Level 1 [Member]
Fair value	0
Fair Value, Inputs, Level 2 [Member]
Fair value	28,549
Fair Value, Inputs, Level 3 [Member]
Fair value	0
US Treasury Securities [Member]
Fair value	15,093
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value	0
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value	15,093
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value	0
Certificates of Deposit [Member]
Fair value	13,456
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value	0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value	13,456
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value	$ 0

Note 5 - Other Comprehensive _3

Note 5 - Other Comprehensive Loss (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	$ (1,898)	$ 0	$ 0

Note 5 - Other Comprehensive _4

Note 5 - Other Comprehensive Loss - Changes in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Unrealized losses on available-for-sale securities before tax	$ (1,590)	$ 0	$ 0
Unrealized losses on available-for-sale securities	366
Unrealized losses on available-for-sale securities net of tax	(1,224)
Unrealized loss on foreign currency translation	(854)
Unrealized loss on foreign currency translation	180
Unrealized loss on foreign currency translation	(674)
Other comprehensive loss before tax	(2,444)	0	0
Other comprehensive loss	546	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	$ (1,898)	$ 0	$ 0

Note 6 - Income Taxes (Details

Note 6 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Accrued Income Taxes, Current	$ 1,791,000	$ 933,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 0	0
Open Tax Year	2017 2018 2019 2020 2021 2022
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 0		$ 769,000
Open Tax Year	2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 292,000	$ 300,000
State and Local Jurisdiction [Member] | Research and Development and Alternative Minimum Tax Credit Carryforwards [Member]
Deferred Tax Assets, Valuation Allowance, Total			$ 0
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] | Nestor Cables [Member]
Open Tax Year	2018 2019 2020 2021 2022

Note 6 - Income Taxes - Income

Note 6 - Income Taxes - Income Tax Expense (Benefit) Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Federal	$ 13,230	$ 5,154	$ 1,966
State	1,532	440	175
Foreign	48	0	0
Current income tax expense	14,810	5,594	2,142
Federal	(509)	(234)	(252)
State	6	47	(26)
Foreign	165	0	0
Deferred income tax expense	(334)	(187)	(280)
Income tax expense	$ 14,472	$ 5,407	$ 1,862

Note 6 - Income Taxes - Reconci

Note 6 - Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate (Details)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Federal statutory rate	21%	21%	21%
State income taxes	2.10%	2.20%	2%
Foreign income taxes	0.40%	0%	0%
Permanent differences	4.60%	0%	0%
Change in valuation allowance	0%	0%	(0.50%)
Expiration and utilization of state NOL’s	0%	0%	0.40%
Research and development credits	(0.50%)	(0.70%)	(2.50%)
Excess tax expense (benefits) from stock-based compensation	4.90%	1.50%	0.10%
Effective Tax rate	22.70%	21%	20.30%

Note 6 - Income Taxes - Signifi

Note 6 - Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Intangibles	$ (102)	$ (92)
Property and equipment depreciation	(1,068)	(381)
Net operating loss carry forwards and credits	256	300
Stock-based compensation	416	231
Inventories	813	519
Prepaid expenses	(163)	(48)
Accrued expenses and reserves	1,020	519
Foreign currency translation	180	0
Unrealized loss on investments	365	0
Goodwill	(1,077)	(683)
Net deferred tax asset	$ 640	$ 365

Note 7 - Concentrations (Detail

Note 7 - Concentrations (Details Textual)	12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020
Property, Plant and Equipment, Net, Total	$ 18,229,000	$ 4,998,000
MEXICO
Property, Plant and Equipment, Net, Total	4,213,000	$ 1,769,000
Oulu, Finland [Member] | Nestor Cables [Member]
Property, Plant and Equipment, Net, Total	6,916,000
Keila, Estonia [Member] | Nestor Cables [Member]
Property, Plant and Equipment, Net, Total	$ 280,000
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	1	2	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage	14%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage		28%	30%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers	1	1
Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage	20%	17%

Note 7 - Concentrations - Disag

Note 7 - Concentrations - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Total Net Sales	$ 270,883	$ 140,755	$ 93,075
Percent of net sales	100%	100%	100%
Broadband Service Providers [Member]
Percent of net sales	99%	98%	96%
Legacy Customers [Member]
Percent of net sales	1%	2%	4%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Total Net Sales	$ 255,607	$ 131,285	$ 89,022
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Total Net Sales	$ 15,276	$ 9,470	$ 4,053

Note 8 - Employee Benefit Plan

Note 8 - Employee Benefit Plan (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,129,000	$ 915,000	$ 839,000
Nestor Cables [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 204,000
Employee Wages, Accrued for Monthly, Percent	17.45%
First Level of Matching [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3%
Second Level Of Matching [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3%

Note 9 - Leases (Details Textua

Note 9 - Leases (Details Textual)		12 Months Ended
	Jul. 31, 2021 USD ($) ft²	Sep. 30, 2022 USD ($) ft²	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Nov. 19, 2021 ft²	Jan. 01, 2015
Operating Lease, Weighted Average Remaining Lease Term (Year)		4 years 14 days	3 years 1 month 2 days
Operating Lease, Weighted Average Discount Rate, Percent		3.22%	3.41%
Operating Lease, Payments | $		$ 2,064,000	$ 1,290,000	$ 812,000
7050 Winnetka Avenue North, Brooklyn Park, Minnesota [Member]
Area of Real Estate Property (Square Foot)		85,000
Lessee, Operating Lease, Term of Contract (Year)						10 years 2 months 1 day
Tijuana, Mexico 3 [Member]
Area of Real Estate Property (Square Foot)	318,000
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)	7 years
Lessee, Operating Lease, Number of Options to Renew	2
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term (Year)	5 years				5 years
Operating Lease, Monthly Payment | $	$ 162,000
Operating Lease, Payments, Increase, Percentage	2%
Tijuana, Mexico 3 [Member] | Lease Mandatory Contractual Term [Member]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)	5 years
Brooklyn Part, MN [Member]
Area of Real Estate Property (Square Foot)					105,000
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)					5 years
Oulu, Finland [Member]
Area of Real Estate Property (Square Foot)		25,000
Operating Lease, Monthly Payment | $		$ 40,000

Note 9 - Leases - Operating Lea

Note 9 - Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Total lease expense under ASC 842	$ 2,801	$ 1,216	$ 1,126
Cost of Sales [Member]
Total lease expense under ASC 842	2,534	999	905
Selling, General and Administrative Expenses [Member]
Total lease expense under ASC 842	$ 277	$ 217	$ 221

Note 9 - Leases - Maturities of

Note 9 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
FY 2023	$ 3,775
FY 2024	3,823
FY 2025	3,056
FY 2026	2,868
FY 2027	1,196
Thereafter	0
Total lease payments	14,718
Less: Interest	(921)
Present value of lease liabilities	$ 13,797

Note 10 - Debt (Details Textual

Note 10 - Debt (Details Textual) - USD ($)		1 Months Ended	12 Months Ended
	Apr. 27, 2022	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Long-Term Debt, Total				$ 0
Senior Loans [Member]
Debt Instrument, Face Amount		$ 2,000,000
Debt Instrument, Term (Year)		3 years
Debt Instrument, Covenant, Interest Payment Cap		5%
Debt Instrument, Covenant, Interest Penalty		2%
Revolving Credit Facility [Member] | Loan and Security Agreement With Bremer Bank, National Association [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000
Debt Instrument, Minimum Interest Rate Required	1.80%
Debt Instrument, Interest Rate During Period			4.36%
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio	1.20
Debt Instrument, Covenant, Maximum Debt to Cash Flow Ratio	2
Long-Term Line of Credit, Total			$ 16,700,000
Debt Instrument, Collateral Amount			$ 198,087,000
Revolving Credit Facility [Member] | Loan and Security Agreement With Bremer Bank, National Association [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.85%

Note 11 - Acquisition of Nest_3

Note 11 - Acquisition of Nestor Cables (Details Textual) € in Millions			12 Months Ended
	Jul. 26, 2022 USD ($)	Jul. 26, 2022 EUR (€)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Goodwill, Ending Balance			$ 6,402,000	$ 4,709,000
Nestor Cables [Member]
Business Acquisition, Percentage of Voting Interests Acquired	100%
Business Combination, Consideration Transferred, Total	$ 8,000,000	€ 7.9
Business Combination, Consideration Transferred, Liabilities Incurred	7,800,000	€ 7.6
Goodwill, Ending Balance	$ 1,762,000
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	12 years 9 months 10 days	12 years 9 months 10 days
Nestor Cables [Member] | Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs			$ 1,600,000
Nestor Cables [Member] | Approximate [Member]
Goodwill, Ending Balance	$ 1,700,000
Nestor Cables [Member] | Revolving Credit Facility [Member]
Proceeds from Lines of Credit, Total	$ 16,700,000

Note 11 - Acquisition of Nest_4

Note 11 - Acquisition of Nestor Cables - Summary of Estimated Fair Value of Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jul. 26, 2022	Sep. 30, 2021
Goodwill	$ 6,402		$ 4,709
Nestor Cables [Member]
Cash		$ 72
Accounts receivables		10,562
Inventories		11,377
Other current assets		173
Total current assets		22,184
Property and equipment		7,689
Intangibles assets		1,840
Right of use lease asset		1,297
Goodwill		1,762
Other		55
Total assets		34,827
Accounts payable		5,839
Accrued compensation		1,430
Accrued expenses		1,916
Deferred tax liability		621
Lease liability		1,297
Factoring liability		5,849
Long term debt		2,045
Total liabilities		18,997
Net assets acquired		$ 15,830

Note 12 - Segment Reporting (De

Note 12 - Segment Reporting (Details Textual)	12 Months Ended
	Sep. 30, 2022
Number of Reportable Segments	2

Note 12 - Segment Reporting - R

Note 12 - Segment Reporting - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Revenue from external customers	$ 270,883,000	$ 140,755,000	$ 93,075,000
Revenue from internal customers (Clearfield, Inc.)	182,000
Net investment income	328,000
Interest Expense	311,000
Depreciation and amortization	3,413,000	2,302,000	2,422,000
Stock based compensation	2,339,000	1,280,000	774,000
Income taxes	14,472,000	5,407,000	1,862,000
Net Income (loss)	49,362,000	20,327,000	$ 7,293,000
Capital Expenditures	8,500,000
Goodwill	6,402,000	4,709,000
Total Assets	229,128,000	$ 125,911,000
Clearfield [Member]
Revenue from external customers	263,822,000
Revenue from internal customers (Clearfield, Inc.)	0
Net investment income	327,000
Interest Expense	141,000
Depreciation and amortization	3,174,000
Stock based compensation	2,339,000
Income taxes	14,258,000
Net Income (loss)	49,771,000
Capital Expenditures	8,487,000
Goodwill	4,709,000
Total Assets	198,255,000
Nestor Cables [Member]
Revenue from external customers	7,061,000
Revenue from internal customers (Clearfield, Inc.)	182,000
Net investment income	1,000
Interest Expense	170,000
Depreciation and amortization	239,000
Stock based compensation	0
Income taxes	214,000
Net Income (loss)	(409,000)
Capital Expenditures	13,000
Goodwill	1,693,000
Total Assets	$ 30,873,000

Note 13 - Financing Receivabl_2

Note 13 - Financing Receivables (Details Textual) € in Millions	12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Sep. 30, 2021 USD ($)
Factoring Liabilities	$ 4,391,000		$ 0
Financing Receivables, Percentage of Cash Initially Received	80%	80%
Financing Receivable, Percentage of Balance Received When Invoice is Paid	20%	20%
Financing Receivable, Limit	$ 12,300,000	€ 12.5
Financing Receivable, Average Interest Rate During Period	2.14%
Minimum [Member]
Agreement Termination Period (Year)	0 years
Maximum [Member]
Agreement Termination Period (Year)	1 year
Euribor [Member] | Minimum [Member]
Financing Receivable, Interest Rate, Basis Spread on Variable Rate	0.75%
Euribor [Member] | Maximum [Member]
Financing Receivable, Interest Rate, Basis Spread on Variable Rate	1.30%