Clearfield (CLFD) 10-K 12 Nov 20 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2020	Nov. 06, 2020	Mar. 31, 2020
Document Information [Line Items]
Entity Registrant Name	Clearfield, Inc.
Entity Central Index Key	0000796505
Trading Symbol	clfd
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		13,649,962
Entity Public Float			$ 130,912,520
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, $0.01 par value

Condensed Balance Sheets

Condensed Balance Sheets - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Current Assets
Cash and cash equivalents	$ 16,449,636	$ 10,081,721
Short-term investments	10,582,527	13,524,270
Accounts receivables, net	10,496,672	9,118,639
Inventories, net	14,408,538	9,012,980
Other current assets	585,436	769,161
Total current assets	52,522,809	42,506,771
Property, plant and equipment, net	5,109,988	5,413,241
Other Assets
Long-term investments	25,143,000	23,902,000
Goodwill	4,708,511	4,708,511
Intangible assets, net	4,829,047	5,147,135
Right of use lease assets	2,539,100
Deferred tax asset	178,118
Other	266,857	210,905
Total other assets	37,664,633	33,968,551
Total Assets	95,297,430	81,888,563
Current Liabilities
Current portion of lease liability	665,584
Accounts payable	3,689,587	3,173,599
Accrued compensation	4,856,885	3,224,860
Accrued expenses	1,202,753	208,603
Total current liabilities	10,414,809	6,607,062
Other Liabilities
Long-term portion of lease liability	2,129,343
Deferred tax liability		101,690
Deferred rent		246,424
Total other liabilities	2,129,343	348,114
Total liabilities	12,544,152	6,955,176
Shareholders’ Equity
Preferred stock, $.01 par value; 500,000 shares; no shares issued or outstanding
Common stock, authorized 50,000,000, $.01 par value; 13,649,962 and 13,641,805 shares issued and outstanding as of September 30, 2020 and September 30, 2019	136,500	136,418
Additional paid-in capital	57,502,905	56,976,162
Retained earnings	25,113,873	17,820,807
Total shareholders’ equity	82,753,278	74,933,387
Total Liabilities and Shareholders’ Equity	$ 95,297,430	$ 81,888,563

Condensed Balance Sheets (Paren

Condensed Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2020	Sep. 30, 2019
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)	13,649,962	13,641,805
Common stock, shares outstanding (in shares)	13,649,962	13,641,805

Statements of Earnings

Statements of Earnings - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net sales	$ 93,074,514	$ 85,034,182
Cost of sales	55,160,316	52,345,059
Gross profit	37,914,198	32,689,123
Operating expenses
Selling, general and administrative	29,530,198	27,500,989
Income from operations	8,384,000	5,188,134
Interest income	770,950	738,459
Income before income taxes	9,154,950	5,926,593
Income tax expense	1,861,884	1,360,437
Net income	$ 7,293,066	$ 4,566,156
Net income per share Basic (in dollars per share)	$ 0.53	$ 0.34
Net income per share Diluted (in dollars per share)	$ 0.53	$ 0.34
Weighted average shares outstanding:
Basic (in shares)	13,643,355	13,442,871
Diluted (in shares)	13,643,355	13,451,214

Statements of Shareholders' Equ

Statements of Shareholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Sep. 30, 2018	13,646,553
Balance at Sep. 30, 2018	$ 136,466	$ 55,483,759	$ 13,254,651	$ 68,874,876
Stock-based compensation expense		1,729,025		1,729,025
Restricted stock issuance, net (in shares)	(7,490)
Restricted stock issuance, net	$ (75)	75
Issuance of common stock under employee stock purchase plan (in shares)	37,235
Issuance of common stock under employee stock purchase plan	$ 372	313,519		313,891
Exercise of stock options, net of shares exchanged for payment (in shares)	6,440
Exercise of stock options, net of shares exchanged for payment	$ 64	2,540		2,604
Repurchase of shares for payment of withholding taxes for vested restricted stock grants (in shares)	(40,933)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	$ (409)	(552,756)		(553,165)
Net income			4,566,156	4,566,156
Balance at Sep. 30, 2019	$ 136,418	56,976,162	17,820,807	74,933,387
Balance (in shares) at Sep. 30, 2019	13,641,805
Stock-based compensation expense		773,555		773,555
Restricted stock issuance, net (in shares)	8,580
Restricted stock issuance, net	$ 86	(86)
Issuance of common stock under employee stock purchase plan (in shares)	30,223
Issuance of common stock under employee stock purchase plan	$ 302	348,474		348,776
Exercise of stock options, net of shares exchanged for payment (in shares)	21,188
Exercise of stock options, net of shares exchanged for payment	$ 212	9,352		9,564
Repurchase of shares for payment of withholding taxes for vested restricted stock grants (in shares)	(10,038)
Repurchase of shares for payment of withholding taxes for vested restricted stock grants	$ (100)	(176,316)		(176,416)
Net income			7,293,066	7,293,066
Repurchase of common stock (in shares)	(41,796)
Repurchase of common stock	$ (418)	(428,236)		(428,654)
Balance (in shares) at Sep. 30, 2020	13,649,962
Balance at Sep. 30, 2020	$ 136,500	$ 57,502,905	$ 25,113,873	$ 82,753,278

Statements of Cash Flows

Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 7,293,066	$ 4,566,156
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	2,421,754	2,178,409
Change in allowance for doubtful accounts		210,000
Amortization of discount on investments	(64,327)	(71,652)
Deferred taxes	(279,808)	(3,245)
Loss on disposal of assets	5,785
Stock-based compensation	773,555	1,729,025
Changes in operating assets and liabilities:
Accounts receivable	(1,378,033)	3,492,619
Inventories, net	(5,395,558)	1,037,155
Other assets	127,773	(10,469)
Accounts payable, accrued expenses and deferred rent	3,151,566	1,604,655
Net cash provided by operating activities	6,655,773	14,732,653
Cash flows from investing activities
Purchases of property, plant and equipment and intangible assets	(1,806,198)	(2,511,646)
Purchases of investments	(34,056,930)	(20,311,393)
Proceeds from maturities of investments	35,822,000	9,861,000
Net cash used in investing activities	(41,128)	(12,962,039)
Cash flows from financing activities
Repurchases of common stock	(428,654)
Proceeds from issuance of common stock under employee stock purchase plan	348,776	313,891
Proceeds from issuance of common stock upon exercise of stock options	9,564	2,604
Tax withholding related to vesting of restricted stock grants	(176,416)	(553,165)
Net cash used in financing activities	(246,730)	(236,670)
Increase in cash and cash equivalents	6,367,915	1,533,944
Cash and cash equivalents, beginning of year	10,081,721	8,547,777
Cash and cash equivalents, end of year	16,449,636	10,081,721
Supplemental disclosures for cash flow information
Cash paid during the year for income taxes	1,442,079	1,683,113
Non-cash financing activities
Cashless exercise of stock options	$ 97,811	$ 17,390

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business: Revenue Recognition: Cash and Cash Equivalents: three September 30, 2020 2019 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 three September 30, 2020 September 30, 2019 Less than one year $ 10,582,527 $ 13,524,270 1-5 years 25,143,000 23,902,000 Total $ 35,725,527 $ 37,426,270 Fair Value of Financial Instruments: Accounts Receivable: not not The allowance for doubtful accounts activity for the years ended September 30, 2020 2019 Year Ended Balance at Beginning of Year Additions Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2020 $ 289,085 $ - $ - $ 289,085 September 30, 2019 79,085 210,000 - 289,085 Inventories: first first September 30, 2020 September 30, 2019 Raw materials $ 12,287,134 $ 8,234,046 Work-in-process 1,033,021 540,962 Finished goods 2,048,514 1,356,720 Inventories, gross 15,368,669 10,131,728 Inventory reserve (960,131 ) (1,118,748 ) Inventories, net $ 14,408,538 $ 9,012,980 The increase in inventory from fiscal year 2019 2020 19 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 down to its net realizable value 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 7 Leasehold improvements 7-10 or life of lease Vehicles 3 Property, plant and equipment consist of the following: September 30, 2020 September 30, 2019 Manufacturing equipment $ 8,171,497 $ 7,106,041 Office equipment 4,281,481 3,996,251 Leasehold improvements 2,576,861 2,436,346 Vehicles 245,903 245,903 Construction in progress 19,143 8,921 Property, plant and equipment, gross 15,294,885 13,793,462 Less accumulated depreciation 10,184,897 8,380,221 Property, plant and equipment, net $ 5,109,988 $ 5,413,241 Depreciation expense for the years ended September 30, 2020 2019 $1,944,186 $1,705,583, Goodwill and Intangible Assets : one fourth may not September 30, 2020 2019 no September 30, 2020 2019, 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 September 30, 2020 2019, 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 20 September 30, 2020, 22 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. September 30, 2020 2019 September 30, 2020 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 654,850 $ 3,087,150 Certifications 8 1,068,000 350,437 717,563 Trademarks 8 563,000 184,734 378,266 Patents 20 689,889 56,257 633,632 Other 5 31,091 18,655 12,436 Totals $ 6,093,980 $ 1,264,933 $ 4,829,047 September 30, 2019 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 405,384 $ 3,336,616 Certifications 8 1,068,000 216,937 851,063 Trademarks 8 563,000 114,359 448,641 Patents 20 530,409 38,247 492,162 Other 5 31,091 12,438 18,653 Totals $ 5,934,500 $ 787,365 $ 5,147,135 Amortization expense related to these assets for the years ended September 30, 2020 2019 $477,568 $472,827, Impairment of Long-Lived Assets: may not the carrying amount of the long-lived asset or asset group is 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 September 30, 2020 2019, 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, 2020 September 30, 2019, 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 Research and Development Costs $1,269,542 $1,089,637 September 30, 2020 2019, Advertising Costs $296,571 $278,057 September 30, 2020 2019, Net Income Per Share: Weighted average common shares outstanding for the years ended September 30, 2020 2019 Year ended September 30, 2020 2019 Net income $ 7,293,066 $ 4,566,156 Weighted average common shares 13,643,355 13,442,871 Dilutive potential common shares - 8,343 Weighted average dilutive common shares outstanding 13,643,355 13,451,214 Earnings per share: Basic $ 0.53 $ 0.34 Diluted $ 0.53 $ 0.34 There were 337,100 108,000 September 30, 2020 2019, Use of Estimates: may Recently Issued Accounting Pronouncements: Effective October 1, 2019, 2016 02, Leases July 2018, 2018 11, Leases, Targeted Improvements not 12 not $2.4 $2.6 not In January 2017, 2017 04, Intangibles-Goodwill, 2 December 15, 2019, January 1, 2017. first 2021, 2017 04 not In June 2016, 2016 13, Measurement of Credit Losses on Financial Instruments November 2018, 2018 19 2016 13. first 2023, 2016 13

Note 2 - Shareholders' Equity

Note 2 - Shareholders' Equity	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	NOTE 2 – SHAREHOLDERS' EQUITY Share Repurchase Program : November 13, 2014, $8,000,000 April 25, 2017, $4,000,000 $12,000,000 not April 2020, 19 September 30, 2020, $4,980,671 The Company is authorized to issue 50,000,000 $.01 5,000,000 500,000 none may, may Stock-Based Compensation: The Company currently has one 2007 2007 769,545 September 30, 2020. September 30, 2020, $1,938,136 3.9 September 30, 2020 2019 $773,555 $1,729,025, September 30, 2020, $752,011 $21,544 September 30, 2019, $1,638,829 $90,196 Stock Options: September 30, 2020, 121,350 5.71 4.71 $12.43. September 30, 2019, 172,000 4 three $12.17. Year ended September 30, 2020 Year ended September 30, 2019 Dividend yield 0 % 0 % Weighted average expected volatility 39.5 – 44.9 % 37.77 % Weighted average risk-free interest rate 0.24 – 1.69 % 2.92 % Weighted average expected life (in years) 4 – 6 3.0 Vesting period (in years) 3 – 5 3.0 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 44,000 September 30, 2020 36,000 September 30, 2019. September 30, 2020, 14,688 September 30, 2019, 6,750 September 30, 2020 September 30, 2019 $332,468 $81,728, Option transactions under the 2007 September 30, 2020 2019 Number of shares Weighted average exercise price Weighted average fair value Outstanding as of September 30, 2018 138,500 $ 10.99 Granted 172,000 12.17 $ 3.53 Cancelled or Forfeited (12,000 ) 12.17 Exercised (7,750 ) 2.58 Outstanding as of September 30, 2019 290,750 11.86 Granted 121,350 12.43 $ 4.62 Cancelled or Forfeited (48,250 ) 13.35 Exercised (26,750 ) 4.01 Outstanding as of September 30, 2020 337,100 $ 12.48 The following table summarizes information concerning options exercisable under the 2007 Year ended Exercisable Weighted average remaining contractual life (in years) Weighted average exercise price September 30, 2020 97,333 2.19 $ 12.76 September 30, 2019 58,750 2.40 $ 9.19 The following table summarizes information concerning options currently outstanding at: Year Ended Number outstanding Weighted average remaining contractual life (in years) Weighted average exercise price Aggregate intrinsic value September 30, 2020 337,100 3.43 $ 12.48 $ 720,831 September 30, 2019 290,750 3.04 $ 11.86 $ 156,173 Restricted Stock: 2007 one ten Restricted stock transactions during the years ended September 30, 2020 2019 Number of shares Weighted average grant date fair value Unvested shares as of September 30, 2018 248,613 $ 14.65 Granted 4,340 14.40 Vested (110,683 ) 16.31 Forfeited (11,830 ) 14.47 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 The Company repurchased a total of 41,796 $10.26 September 30, 2020. 40,933 $13.51 September 30, 2019. Employee Stock Purchase Plan: 2010 may may no 85% one six July 1 January 1 December 31, 2019 June 30, 2020, 15,107 15,116 $11.23 $11.85 December 31, 2018 June 30, 2019, 17,312 19,923 $8.43. September 30, 2020, $84,595 July 1, 2020. February 2020, 200,000 June 30, 2020, 219,623

Note 3 - Income Taxes

Note 3 - Income Taxes	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 3 – INCOME TAXES Components of income tax expense are as follows for the years ended: September 30, September 30, 2020 2019 Current: Federal $ 1,966,491 $ 1,260,552 State 175,201 103,130 Current income tax expense 2,141,692 1,363,682 Deferred: Federal (252,929 ) (38,534 ) State (26, 879) 35,289 Deferred income tax expense (279,808 ) (3,245 ) Income tax expense $ 1,861,884 $ 1,360,437 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, 2020 2019 Federal statutory rate 21 % 21 % State income taxes 2 % 2 % Permanent differences: Change in valuation allowance (1 %) (1 %) Expiration and utilization of state NOL's - 2 % Research and development credits (2 %) (2 %) Excess tax expense (benefits) from stock-based compensation - 1 % Tax rate 20 % 23 % As of September 30, 2020, $845,000 September 30, 2019, $145,000. As of September 30, 2020 2019, no $769,000 $1,905,000 2021 2022 not September 30, 2020, $337,000 $32,000, not not 2030. Significant components of deferred income tax assets and liabilities are as follows at: September 30, September 30, 2020 2019 Deferred income tax assets (liabilities): Intangibles $ (86,319 ) $ (75,190 ) Property and equipment depreciation (419,896 ) (521,586 ) Net operating loss carry forwards and credits 351,446 377,505 Stock-based compensation 169,730 114,118 Inventories 386,296 350,197 Prepaid expenses (43,233 ) (63,252 ) Accrued expenses and reserves 467,010 371,414 Goodwill (646,916 ) (607,882 ) Gross deferred tax asset (liability) 178,118 (54,676 ) Valuation allowance - (47,014 ) Net deferred tax asset (liability) $ 178,118 $ (101,690 ) Realization of NOL carryforwards and other deferred tax temporary differences are contingent upon future taxable earnings. The Company's deferred tax assets were reviewed for expected utilization by assessing the available positive and negative factors surrounding their recoverability. As of September 30, 2018, $105,000 fourth 2019, $58,000 2019 $68,000 $10,000 September 30, 2019 $47,000 not September 30, 2020, no may The valuation allowance activity for the years ended September 30, 2020 2019 Year Ended Balance at Beginning of Year Income Tax Expense (Benefit) Reversal for State NOL Expiration and Utilization Balance at End of Year September 30, 2020 $ 47,014 $ (5,235 ) $ (41,779 ) $ - September 30, 2019 104,858 $ 10,448 $ (68,292 ) $ 47,014 The Company completed an Internal Revenue Code Section 382 2009 not 382. not 382 2009 not 2009 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, 2020 2019. The Company is subject to income taxes in the U.S. federal jurisdiction, and various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. With few exceptions, the Company is no 2004. 2003

Note 4 - Concentrations

Note 4 - Concentrations	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	NOTE 4 – CONCENTRATIONS Suppliers: third may may Customers: September 30, 2020 2019, two 30% 29% not As of September 30, 2020 2019, two 25% 28% Disaggregation of Revenue The following table presents our domestic and international sales for each of the last two Year Ended September 30, 2020 2019 United States $ 89,021,000 $ 78,553,000 All Other Countries 4,054,000 6,481,000 Total Net Sales $ 93,075,000 $ 85,034,000 Clearfield sells its products to the Broadband Service Provider marketplace. In addition, the Company provides Build-to-Print 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 two Year Ended September 30, 2020 2019 Broadband service providers $ 96 % $ 95 % Build-to-print customers 4 % 5 % Total Net Sales $ 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, 2020 2019, $1,686,209 $1,406,546,

Note 5 - Employee Benefit Plan

Note 5 - Employee Benefit Plan	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Retirement Benefits [Text Block]	NOTE 5 – EMPLOYEE BENEFIT PLAN The Company maintains a contributory 401 may not 100% first 3% 50% 3% $838,946 $702,202 September 30, 2020 2019, .

Note 6 - Leases

Note 6 - Leases	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	NOTE 6 Clearfield leases a 71,000 7050 ten two January 1, 2015. June 30, 2019, 14,000 $249,000, one eighth not not The Company's indirect lease for a 46,000 July 31, 2020 2020 7 On February 12, 2020, 52,000 42 February 12, 2020. two three 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 September 30, 2020, not not Operating lease expense included within cost of sales and selling, general and administrative expense was as follows for the year ended September 30, 2020: Operating lease expense under ASC842, Leases, within: Year ended September 30, 2020 Cost of sales $ 904,638 Selling, general and administrative 221,507 Total lease expense $ 1,126,145 Future maturities of lease liabilities were as follows as of September 30, 2020: Operating FY2021 $ 752,423 FY2022 FY2023 744,963 FY2024 516,725 FY2025 217,552 Thereafter - Total lease payments $ 3,004,465 Less: Interest (209,538 ) Present value of lease liabilities $ 2,794,927 The weighted average term and weighted average discount rate for our leases as of September 30, 2020 3.99 3.48%, September 30, 2020, $812,107. Rent expense for our operating leases as accounted for under ASC 840, Leases September 30, 2019. Operating lease expense under ASC840, Leases, within: Year ended September 30, 2019 Cost of sales $ 678,652 Selling, general and administrative 219,216 Total lease expense $ 897,868 As previously disclosed in the Notes to the Financial Statements in our 2019 10 2016 02, Leases (Topic 842 As of September 30, 2019 FY2020 $ 643,040 FY2021 479,213 FY2022 491,397 FY2023 503,895 FY2024 516,720 Thereafter 217,551 Total minimum lease payments $ 2,851,816

Note 7 - Subsequent Events

Note 7 - Subsequent Events	12 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 7 – SUBSEQUENT EVENTS On October 9, 2020, 46,000 three July 31, 2020. three 12 $580,000.

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Revenue [Policy Text Block]	Revenue Recognition:
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents: three September 30, 2020 2019 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 three September 30, 2020 September 30, 2019 Less than one year $ 10,582,527 $ 13,524,270 1-5 years 25,143,000 23,902,000 Total $ 35,725,527 $ 37,426,270
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments:
Receivable [Policy Text Block]	Accounts Receivable: not not The allowance for doubtful accounts activity for the years ended September 30, 2020 2019 Year Ended Balance at Beginning of Year Additions Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2020 $ 289,085 $ - $ - $ 289,085 September 30, 2019 79,085 210,000 - 289,085
Inventory, Policy [Policy Text Block]	Inventories: first first September 30, 2020 September 30, 2019 Raw materials $ 12,287,134 $ 8,234,046 Work-in-process 1,033,021 540,962 Finished goods 2,048,514 1,356,720 Inventories, gross 15,368,669 10,131,728 Inventory reserve (960,131 ) (1,118,748 ) Inventories, net $ 14,408,538 $ 9,012,980 The increase in inventory from fiscal year 2019 2020 19 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 down to its net realizable value 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 7 Leasehold improvements 7-10 or life of lease Vehicles 3 Property, plant and equipment consist of the following: September 30, 2020 September 30, 2019 Manufacturing equipment $ 8,171,497 $ 7,106,041 Office equipment 4,281,481 3,996,251 Leasehold improvements 2,576,861 2,436,346 Vehicles 245,903 245,903 Construction in progress 19,143 8,921 Property, plant and equipment, gross 15,294,885 13,793,462 Less accumulated depreciation 10,184,897 8,380,221 Property, plant and equipment, net $ 5,109,988 $ 5,413,241 Depreciation expense for the years ended September 30, 2020 2019 $1,944,186 $1,705,583,
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill and Intangible Assets : one fourth may not September 30, 2020 2019 no September 30, 2020 2019, 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 September 30, 2020 2019, 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 20 September 30, 2020, 22 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. September 30, 2020 2019 September 30, 2020 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 654,850 $ 3,087,150 Certifications 8 1,068,000 350,437 717,563 Trademarks 8 563,000 184,734 378,266 Patents 20 689,889 56,257 633,632 Other 5 31,091 18,655 12,436 Totals $ 6,093,980 $ 1,264,933 $ 4,829,047 September 30, 2019 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 405,384 $ 3,336,616 Certifications 8 1,068,000 216,937 851,063 Trademarks 8 563,000 114,359 448,641 Patents 20 530,409 38,247 492,162 Other 5 31,091 12,438 18,653 Totals $ 5,934,500 $ 787,365 $ 5,147,135 Amortization expense related to these assets for the years ended September 30, 2020 2019 $477,568 $472,827,
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets: may not the carrying amount of the long-lived asset or asset group is 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 September 30, 2020 2019,
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, 2020 September 30, 2019, 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
Research and Development Expense, Policy [Policy Text Block]	Research and Development Costs $1,269,542 $1,089,637 September 30, 2020 2019,
Advertising Cost [Policy Text Block]	Advertising Costs $296,571 $278,057 September 30, 2020 2019,
Earnings Per Share, Policy [Policy Text Block]	Net Income Per Share: Weighted average common shares outstanding for the years ended September 30, 2020 2019 Year ended September 30, 2020 2019 Net income $ 7,293,066 $ 4,566,156 Weighted average common shares 13,643,355 13,442,871 Dilutive potential common shares - 8,343 Weighted average dilutive common shares outstanding 13,643,355 13,451,214 Earnings per share: Basic $ 0.53 $ 0.34 Diluted $ 0.53 $ 0.34 There were 337,100 108,000 September 30, 2020 2019,
Use of Estimates, Policy [Policy Text Block]	Use of Estimates: may
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements: Effective October 1, 2019, 2016 02, Leases July 2018, 2018 11, Leases, Targeted Improvements not 12 not $2.4 $2.6 not In January 2017, 2017 04, Intangibles-Goodwill, 2 December 15, 2019, January 1, 2017. first 2021, 2017 04 not 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, 2020
Notes Tables
Investments Classified by Contractual Maturity Date [Table Text Block]	September 30, 2020 September 30, 2019 Less than one year $ 10,582,527 $ 13,524,270 1-5 years 25,143,000 23,902,000 Total $ 35,725,527 $ 37,426,270
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Year Ended Balance at Beginning of Year Additions Charged to Costs and Expenses Less Write-offs Balance at End of Year September 30, 2020 $ 289,085 $ - $ - $ 289,085 September 30, 2019 79,085 210,000 - 289,085
Schedule of Inventory, Current [Table Text Block]	September 30, 2020 September 30, 2019 Raw materials $ 12,287,134 $ 8,234,046 Work-in-process 1,033,021 540,962 Finished goods 2,048,514 1,356,720 Inventories, gross 15,368,669 10,131,728 Inventory reserve (960,131 ) (1,118,748 ) Inventories, net $ 14,408,538 $ 9,012,980
Property, Plant and Equipment [Table Text Block]	September 30, 2020 September 30, 2019 Manufacturing equipment $ 8,171,497 $ 7,106,041 Office equipment 4,281,481 3,996,251 Leasehold improvements 2,576,861 2,436,346 Vehicles 245,903 245,903 Construction in progress 19,143 8,921 Property, plant and equipment, gross 15,294,885 13,793,462 Less accumulated depreciation 10,184,897 8,380,221 Property, plant and equipment, net $ 5,109,988 $ 5,413,241
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2020 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 654,850 $ 3,087,150 Certifications 8 1,068,000 350,437 717,563 Trademarks 8 563,000 184,734 378,266 Patents 20 689,889 56,257 633,632 Other 5 31,091 18,655 12,436 Totals $ 6,093,980 $ 1,264,933 $ 4,829,047 September 30, 2019 Years Gross Carrying Amount Accumulated Amortization Net Book Value Amount Customer relationships 15 $ 3,742,000 $ 405,384 $ 3,336,616 Certifications 8 1,068,000 216,937 851,063 Trademarks 8 563,000 114,359 448,641 Patents 20 530,409 38,247 492,162 Other 5 31,091 12,438 18,653 Totals $ 5,934,500 $ 787,365 $ 5,147,135
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year ended September 30, 2020 2019 Net income $ 7,293,066 $ 4,566,156 Weighted average common shares 13,643,355 13,442,871 Dilutive potential common shares - 8,343 Weighted average dilutive common shares outstanding 13,643,355 13,451,214 Earnings per share: Basic $ 0.53 $ 0.34 Diluted $ 0.53 $ 0.34
Useful Lives [Member]
Notes Tables
Property, Plant and Equipment [Table Text Block]	Years Equipment 3 7 Leasehold improvements 7-10 or life of lease Vehicles 3

Note 2 - Shareholders' Equity (

Note 2 - Shareholders' Equity (Tables)	12 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Year ended September 30, 2020 Year ended September 30, 2019 Dividend yield 0 % 0 % Weighted average expected volatility 39.5 – 44.9 % 37.77 % Weighted average risk-free interest rate 0.24 – 1.69 % 2.92 % Weighted average expected life (in years) 4 – 6 3.0 Vesting period (in years) 3 – 5 3.0
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Number of shares Weighted average exercise price Weighted average fair value Outstanding as of September 30, 2018 138,500 $ 10.99 Granted 172,000 12.17 $ 3.53 Cancelled or Forfeited (12,000 ) 12.17 Exercised (7,750 ) 2.58 Outstanding as of September 30, 2019 290,750 11.86 Granted 121,350 12.43 $ 4.62 Cancelled or Forfeited (48,250 ) 13.35 Exercised (26,750 ) 4.01 Outstanding as of September 30, 2020 337,100 $ 12.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]	Year ended Exercisable Weighted average remaining contractual life (in years) Weighted average exercise price September 30, 2020 97,333 2.19 $ 12.76 September 30, 2019 58,750 2.40 $ 9.19
Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]	Year Ended Number outstanding Weighted average remaining contractual life (in years) Weighted average exercise price Aggregate intrinsic value September 30, 2020 337,100 3.43 $ 12.48 $ 720,831 September 30, 2019 290,750 3.04 $ 11.86 $ 156,173
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Number of shares Weighted average grant date fair value Unvested shares as of September 30, 2018 248,613 $ 14.65 Granted 4,340 14.40 Vested (110,683 ) 16.31 Forfeited (11,830 ) 14.47 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

Note 3 - Income Taxes (Tables)

Note 3 - Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	September 30, September 30, 2020 2019 Current: Federal $ 1,966,491 $ 1,260,552 State 175,201 103,130 Current income tax expense 2,141,692 1,363,682 Deferred: Federal (252,929 ) (38,534 ) State (26, 879) 35,289 Deferred income tax expense (279,808 ) (3,245 ) Income tax expense $ 1,861,884 $ 1,360,437
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	September 30, September 30, 2020 2019 Federal statutory rate 21 % 21 % State income taxes 2 % 2 % Permanent differences: Change in valuation allowance (1 %) (1 %) Expiration and utilization of state NOL's - 2 % Research and development credits (2 %) (2 %) Excess tax expense (benefits) from stock-based compensation - 1 % Tax rate 20 % 23 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	September 30, September 30, 2020 2019 Deferred income tax assets (liabilities): Intangibles $ (86,319 ) $ (75,190 ) Property and equipment depreciation (419,896 ) (521,586 ) Net operating loss carry forwards and credits 351,446 377,505 Stock-based compensation 169,730 114,118 Inventories 386,296 350,197 Prepaid expenses (43,233 ) (63,252 ) Accrued expenses and reserves 467,010 371,414 Goodwill (646,916 ) (607,882 ) Gross deferred tax asset (liability) 178,118 (54,676 ) Valuation allowance - (47,014 ) Net deferred tax asset (liability) $ 178,118 $ (101,690 )
Summary of Valuation Allowance [Table Text Block]	Year Ended Balance at Beginning of Year Income Tax Expense (Benefit) Reversal for State NOL Expiration and Utilization Balance at End of Year September 30, 2020 $ 47,014 $ (5,235 ) $ (41,779 ) $ - September 30, 2019 104,858 $ 10,448 $ (68,292 ) $ 47,014

Note 4 - Concentrations (Tables

Note 4 - Concentrations (Tables)	12 Months Ended
	Sep. 30, 2020
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended September 30, 2020 2019 United States $ 89,021,000 $ 78,553,000 All Other Countries 4,054,000 6,481,000 Total Net Sales $ 93,075,000 $ 85,034,000 Year Ended September 30, 2020 2019 Broadband service providers $ 96 % $ 95 % Build-to-print customers 4 % 5 % Total Net Sales $ 100 % $ 100 %

Note 6 - Leases (Tables)

Note 6 - Leases (Tables)	12 Months Ended
	Sep. 30, 2020
Notes Tables
Lessee, Operating Lease Expense [Table Text Block]	Operating lease expense under ASC842, Leases, within: Year ended September 30, 2020 Cost of sales $ 904,638 Selling, general and administrative 221,507 Total lease expense $ 1,126,145 Operating lease expense under ASC840, Leases, within: Year ended September 30, 2019 Cost of sales $ 678,652 Selling, general and administrative 219,216 Total lease expense $ 897,868
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Operating FY2021 $ 752,423 FY2022 FY2023 744,963 FY2024 516,725 FY2025 217,552 Thereafter - Total lease payments $ 3,004,465 Less: Interest (209,538 ) Present value of lease liabilities $ 2,794,927
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	As of September 30, 2019 FY2020 $ 643,040 FY2021 479,213 FY2022 491,397 FY2023 503,895 FY2024 516,720 Thereafter 217,551 Total minimum lease payments $ 2,851,816

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Sep. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)shares	Oct. 01, 2019USD ($)
Depreciation, Total	$ 1,944,186	$ 1,705,583
Number of Reportable Segments	1
Goodwill, Impairment Loss	$ 0	0
Amortization of Intangible Assets, Total	477,568	472,827
Impairment of Long-Lived Assets Held-for-use	0	0
Unrecognized Tax Benefits, Ending Balance	0	0
Research and Development Expense, Total	1,269,542	1,089,637
Advertising Expense	$ 296,571	$ 278,057
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares	337,100	108,000
Operating Lease, Right-of-Use Asset	$ 2,539,100
Operating Lease, Liability, Total	$ 2,794,927
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 2,400,000
Operating Lease, Liability, Total			$ 2,600,000
Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	20 years	20 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	20 years

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Maturity Date of CDs (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Less than one year	$ 10,582,527	$ 13,524,270
1-5 years	25,143,000	23,902,000
Total	$ 35,725,527	$ 37,426,270

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Balance at Beginning of Year	$ 289,085	$ 79,085
Additions Charged to Costs and Expenses		210,000
Less Write-offs
Balance at End of Year	$ 289,085	$ 289,085

Note 1 - Summary of Significa_6

Note 1 - Summary of Significant Accounting Policies - Components of Inventory (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Raw materials	$ 12,287,134	$ 8,234,046
Work-in-process	1,033,021	540,962
Finished goods	2,048,514	1,356,720
Inventories, gross	15,368,669	10,131,728
Inventory reserve	(960,131)	(1,118,748)
Inventories, net	$ 14,408,538	$ 9,012,980

Note 1 - Summary of Significa_7

Note 1 - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	12 Months Ended
	Sep. 30, 2020
Equipment [Member] | Minimum [Member]
Property, plant and equipment useful life (Year)	3 years
Equipment [Member] | Maximum [Member]
Property, plant and equipment useful life (Year)	7 years
Leasehold Improvements [Member] | Minimum [Member]
Property, plant and equipment useful life (Year)	7 years
Leasehold Improvements [Member] | Maximum [Member]
Property, plant and equipment useful life (Year)	10 years
Vehicles [Member]
Property, plant and equipment useful life (Year)	3 years

Note 1 - Summary of Significa_8

Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Fixed Assets	$ 15,294,885	$ 13,793,462
Less accumulated depreciation	10,184,897	8,380,221
Property, plant and equipment, net	5,109,988	5,413,241
Machinery and Equipment [Member]
Fixed Assets	8,171,497	7,106,041
Office Equipment [Member]
Fixed Assets	4,281,481	3,996,251
Leasehold Improvements [Member]
Fixed Assets	2,576,861	2,436,346
Vehicles [Member]
Fixed Assets	245,903	245,903
Construction in Progress [Member]
Fixed Assets	$ 19,143	$ 8,921

Note 1 - Summary of Significa_9

Note 1 - Summary of Significant Accounting Policies - Finite Lived Intangible Assets (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Gross carrying amount	$ 6,093,980	$ 5,934,500
Accumulated amortization	1,264,933	787,365
Net book value amount	$ 4,829,047	$ 5,147,135
Customer Relationships [Member]
Useful life (Year)	15 years	15 years
Gross carrying amount	$ 3,742,000	$ 3,742,000
Accumulated amortization	654,850	405,384
Net book value amount	$ 3,087,150	$ 3,336,616
Certification Marks [Member]
Useful life (Year)	8 years	8 years
Gross carrying amount	$ 1,068,000	$ 1,068,000
Accumulated amortization	350,437	216,937
Net book value amount	$ 717,563	$ 851,063
Trademarks [Member]
Useful life (Year)	8 years	8 years
Gross carrying amount	$ 563,000	$ 563,000
Accumulated amortization	184,734	114,359
Net book value amount	$ 378,266	$ 448,641
Patents [Member]
Useful life (Year)	20 years	20 years
Gross carrying amount	$ 689,889	$ 530,409
Accumulated amortization	56,257	38,247
Net book value amount	$ 633,632	$ 492,162
Other Intangible Assets [Member]
Useful life (Year)	5 years	5 years
Gross carrying amount	$ 31,091	$ 31,091
Accumulated amortization	18,655	12,438
Net book value amount	$ 12,436	$ 18,653

Note 1 - Summary of Signific_10

Note 1 - Summary of Significant Accounting Policies - Weighted Average Common Shares Outstanding (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 7,293,066	$ 4,566,156
Weighted average common shares (in shares)	13,643,355	13,442,871
Dilutive potential common shares		$ 8,343
Weighted average dilutive common shares outstanding (in shares)	13,643,355	13,451,214
Basic (in dollars per share)	$ 0.53	$ 0.34
Diluted (in dollars per share)	$ 0.53	$ 0.34

Note 2 - Shareholders' Equity_2

Note 2 - Shareholders' Equity (Details Textual) - USD ($)	Apr. 25, 2017	Feb. 29, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Nov. 13, 2014
Stock Repurchase Program, Remaining Authorized Repurchase Amount							$ 4,980,671		$ 8,000,000
Stock Repurchase Program, Increase in Authorized Amount	$ 4,000,000
Stock Repurchase Program, Authorized Amount	$ 12,000,000
Common Stock, Shares Authorized (in shares)							50,000,000	50,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)							$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)							500,000	500,000
Preferred Stock, Shares Issued, Total (in shares)							0	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)							769,545
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total							$ 1,938,136
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)							3 years 328 days
Share-based Payment Arrangement, Expense							$ 773,555	$ 1,729,025
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)							121,350	172,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)							5 years 259 days	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)							4 years 259 days	3 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)							$ 12.43	$ 12.17
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number (in shares)							44,000	36,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)							26,750	7,750
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value							$ 332,468	$ 81,728
Stock Repurchased During Period, Shares (in shares)							41,796	40,933
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)							$ 10.26	$ 13.51
Payment, Tax Withholding, Share-based Payment Arrangement							$ 176,416	$ 553,165
Preferred Stock, Shares Outstanding, Ending Balance (in shares)							0	0
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)							219,623
Share-based Compensation Arrangement by Share-based Payment Award, Market Price Percentage, Offering Date							85.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)			15,116	15,107	19,923	17,312
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price (in dollars per share)			$ 11.85	$ 11.23	$ 8.43
Payment, Tax Withholding, Share-based Payment Arrangement							$ 84,595
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)		200,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)							3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)							5 years
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, 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)							14,688	6,750
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							$ 752,011	$ 1,638,829
Cost of Sales [Member]
Share-based Payment Arrangement, Expense							$ 21,544	$ 90,196
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, Total (in shares)							0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)							0

Note 2 - Shareholders' Equity -

Note 2 - Shareholders' Equity - Valuation Assumptions (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Dividend yield	0.00%	0.00%
Weighted average expected volatility		37.77%
Weighted average risk-free interest rate		2.92%
Weighted average expected life (in years) (Year)		3 years
Vesting period (in years) (Year)	4 years 259 days	3 years
Minimum [Member]
Weighted average expected volatility	39.50%
Weighted average risk-free interest rate	0.24%
Weighted average expected life (in years) (Year)	4 years
Vesting period (in years) (Year)	3 years
Maximum [Member]
Weighted average expected volatility	44.90%
Weighted average risk-free interest rate	1.69%
Weighted average expected life (in years) (Year)	6 years
Vesting period (in years) (Year)	5 years

Note 2 - Shareholders' Equity_3

Note 2 - Shareholders' Equity - Option Transaction Summary (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Options, outstanding (in shares)	290,750	138,500
Weighted-average exercise price, outstanding (in dollars per share)	$ 11.86	$ 10.99
Granted (in shares)	121,350	172,000
Weighted-average exercise price, Granted (in dollars per share)	$ 12.43	$ 12.17
Weighted-average fair value, Granted (in dollars per share)	$ 4.62	$ 3.53
Cancelled or Forfeited (in shares)	(48,250)	(12,000)
Weighted-average exercise price, Cancelled or Forfeited (in dollars per share)	$ 13.35	$ 12.17
Exercised (in shares)	(26,750)	(7,750)
Weighted-average exercise price, Exercised (in dollars per share)	$ 4.01	$ 2.58
Options, outstanding (in shares)	337,100	290,750
Weighted-average exercise price, outstanding (in dollars per share)	$ 12.48	$ 11.86

Note 2 - Shareholders' Equity_4

Note 2 - Shareholders' Equity - Options Exercisable (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Exercisable (in shares)	97,333	58,750
Weighted average remaining contractual life (Year)	2 years 69 days	2 years 146 days
Weighted average exercise price (in dollars per share)	$ 12.76	$ 9.19

Note 2 - Shareholders' Equity_5

Note 2 - Shareholders' Equity - Options Currently Outstanding (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Number outstanding (in shares)	337,100	290,750	138,500
Weighted average remaining contractual life (Year)	3 years 156 days	3 years 14 days
Weighted average exercise price (in dollars per share)	$ 12.48	$ 11.86	$ 10.99
Aggregate intrinsic value	$ 720,831	$ 156,173

Note 2 - Shareholders' Equity_6

Note 2 - Shareholders' Equity - Restricted Stock Transactions (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Balance, unvested shares (in shares)	130,440	248,613
Balance, weighted-average grant date fair value (in dollars per share)	$ 13.25	$ 14.65
Granted (in shares)	19,455	4,340
Granted, weighted-average grant date fair value (in dollars per share)	$ 10.30	$ 14.40
Vested (in shares)	(29,950)	(110,683)
Vested, weighted-average grant date fair value (in dollars per share)	$ 13.36	$ 16.31
Forfeited (in shares)	(10,875)	(11,830)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 12.14	$ 14.47
Balance, unvested shares (in shares)	109,070	130,440
Balance, weighted-average grant date fair value (in dollars per share)	$ 12.98	$ 13.25

Note 3 - Income Taxes (Details

Note 3 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2018
Accrued Income Taxes, Current	$ 145,000	$ 845,000
Deferred Tax Assets, Valuation Allowance, Total	47,014		$ 104,858
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	0	$ 0
Open Tax Year		2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2017 2018 2019
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	1,905,000	$ 769,000
Operating Loss Carryforwards, Valuation Allowance, Total	47,000		$ 105,000
State and Local Jurisdiction [Member] | Deferred Tax Assets Related to Operating Loss Carryforwards [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(58,000)
State and Local Jurisdiction [Member] | Valuation Allowance, Operating Loss Carryforwards, Expired and Utilized [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(68,000)
State and Local Jurisdiction [Member] | Valuation Allowance, Operating Loss Carryforwards, Higher Expected NOL Utilization [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 10,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount		337,000
State and Local Jurisdiction [Member] | Alternative Minimum Tax [Member]
Tax Credit Carryforward, Amount		32,000
State and Local Jurisdiction [Member] | Research and Development and Alternative Minimum Tax Credit Carryforwards [Member]
Deferred Tax Assets, Valuation Allowance, Total		$ 0

Note 3 - Income Taxes - Income

Note 3 - Income Taxes - Income Tax Expense (Benefit) Components (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Federal	$ 1,966,491	$ 1,260,552
State	175,201	103,130
Current income tax expense	2,141,692	1,363,682
Federal	(252,929)	(38,534)
State	(26,879)	35,289
Deferred income tax expense	(279,808)	(3,245)
Income tax expense	$ 1,861,884	$ 1,360,437

Note 3 - Income Taxes - Reconci

Note 3 - Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Federal statutory rate	21.00%	21.00%
State income taxes	2.00%	2.00%
Change in valuation allowance	(1.00%)	(1.00%)
Expiration and utilization of state NOL’s		2.00%
Research and development credits	(2.00%)	(2.00%)
Excess tax expense (benefits) from stock-based compensation		1.00%
Tax rate	20.00%	23.00%

Note 3 - Income Taxes - Signifi

Note 3 - Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Gross deferred tax asset (liability)	$ 178,118
Gross deferred tax asset (liability)		$ (54,676)
Valuation allowance		(47,014)	$ (104,858)
Net deferred tax asset (liability)	178,118
Net deferred tax asset (liability)		(101,690)
Long-term [Member]
Intangibles	(86,319)	(75,190)
Property and equipment depreciation	(419,896)	(521,586)
Stock-based compensation	169,730	114,118
Goodwill	(646,916)	(607,882)
Short Term [Member]
Net operating loss carry forwards and credits	351,446	377,505
Inventories	386,296	350,197
Prepaid expenses	(43,233)	(63,252)
Accrued expenses and reserves	$ 467,010	$ 371,414

Note 3 - Income Taxes - Valuati

Note 3 - Income Taxes - Valuation Allowance Activity (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Balance at Beginning of Year	$ 47,014	$ 104,858
Income Tax Benefit	(5,235)	10,448
Reversal for State NOL Expiration and Utilization	(41,779)	(68,292)
Balance at End of Year		$ 47,014

Note 4 - Concentrations (Detail

Note 4 - Concentrations (Details Textual)	12 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)
Property, Plant and Equipment, Net, Ending Balance	$ 5,109,988	$ 5,413,241
MEXICO
Property, Plant and Equipment, Net, Ending Balance	$ 1,686,209	$ 1,406,546
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	2	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage	30.00%	29.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers	2	2
Concentration Risk, Percentage	25.00%	28.00%

Note 4 - Concentrations - Disag

Note 4 - Concentrations - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Total Net Sales	$ 93,074,514	$ 85,034,182
Percent of net sales	100.00%	100.00%
Broadband Service Providers [Member]
Percent of net sales	96.00%	95.00%
Build-to-print Customers [Member]
Percent of net sales	4.00%	5.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Total Net Sales	$ 89,021,000	$ 78,553,000
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Total Net Sales	$ 4,054,000	$ 6,481,000

Note 5 - Employee Benefit Plan

Note 5 - Employee Benefit Plan (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 838,946	$ 702,202
First Level of Matching [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Second Level Of Matching [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%

Note 6 - Leases (Details Textua

Note 6 - Leases (Details Textual)	Jun. 30, 2019ft²	Sep. 30, 2020USD ($)ft²	Feb. 12, 2020ft²	Aug. 01, 2017ft²	Jan. 01, 2015
Operating Lease, Weighted Average Discount Rate, Percent		3.48%
Operating Lease, Payments | $		$ 812,107
Weighted Average [Member]
Lessee, Operating Lease, Term of Contract (Year)		3 years 361 days
7050 Winnetka Avenue North, Brooklyn Park, Minnesota [Member]
Area of Real Estate Property (Square Foot)		71,000
Lessee, Operating Lease, Term of Contract (Year)					10 years 62 days
Additional area of rental space (Square Foot)	14,000
Operating Lease Termination Fee | $		$ 249,000
Tijuana, Mexico [Member]
Area of Real Estate Property (Square Foot)				46,000
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

Note 6 - Leases - Operating Lea

Note 6 - Leases - Operating Lease Expense (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Total lease expense under ASC 842	$ 1,126,145
Total lease expense under ASC 840		$ 897,868
Cost of Sales [Member]
Total lease expense under ASC 842	904,638
Total lease expense under ASC 840		678,652
Selling, General and Administrative Expenses [Member]
Total lease expense under ASC 842	$ 221,507
Total lease expense under ASC 840		$ 219,216

Note 6 - Leases - Maturities of

Note 6 - Leases - Maturities of Lease Liabilities (Details)	Sep. 30, 2020USD ($)
FY2021	$ 752,423
FY2022
FY2023	744,963
FY2024	516,725
FY2025	217,552
Thereafter
Total lease payments	3,004,465
Less: Interest	(209,538)
Present value of lease liabilities	$ 2,794,927

Note 6 - Leases - Future Minimu

Note 6 - Leases - Future Minimum Payments Prior Adoption of ASU 2016-02 (Details)	Sep. 30, 2019USD ($)
FY2020	$ 643,040
FY2021	479,213
FY2022	491,397
FY2023	503,895
FY2024	516,720
Thereafter	217,551
Total minimum lease payments	$ 2,851,816

Note 7 - Subsequent Events (Det

Note 7 - Subsequent Events (Details Textual) - Manufacturing Facility in Tijuana, Mexico [Member] - Subsequent Event [Member]	Oct. 09, 2020USD ($)ft²
Area of Real Estate Property (Square Foot) | ft²	46,000
Lessee, Operating Lease, Term of Contract (Year)	3 years
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | $	$ 580,000