ADDvantage Technologies (AEYGQ) 10-K 17 Dec 20 2020 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Sep. 30, 2020	Dec. 15, 2020	Mar. 31, 2020
Cover [Abstract]
Entity Registrant Name	ADDVANTAGE TECHNOLOGIES GROUP INC
Entity Central Index Key	0000874292
Entity File Number	1-10799
Entity Tax Identification Number	73-1351610
Trading Symbol	aey
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 Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Small Business	true
Document Transition Report	false
Document Annual Report	true
City Area Code	(918)
Local Phone Number	251-9121
Entity Address, Address Line One	1430 Bradley Lane, Suite 196
Entity Address, City or Town	Carrollton
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75007
Entity Incorporation, State or Country Code	OK
Entity Common Stock, Shares Outstanding		12,031,380
Entity Public Float			$ 9,977,537
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, $.01 par value

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 8,265	$ 1,242
Restricted cash	108	352
Accounts receivable, net of allowances of $250 and $150, respectively	3,968	4,827
Unbilled revenue	590	2,691
Promissory note, current	1,400	1,400
Income tax receivable	1,283	21
Inventories, net of allowance of $3,054 and $1,275, respectively	5,756	7,626
Prepaid expenses and other current assets	884	806
Total current assets	22,254	18,965
Property and equipment, at cost:
Machinery and equipment	3,500	2,476
Leasehold improvements	720	191
Total property and equipment, at cost	4,220	2,667
Less: Accumulated depreciation	(1,586)	(836)
Net property and equipment	2,634	1,831
Right-of-use assets	3,758	0
Promissory note, long-term	2,375	4,975
Intangibles, net of accumulated amortization	1,425	6,003
Goodwill	58	4,878
Other assets	179	176
Total assets	32,683	36,828
Current liabilities:
Accounts payable	3,472	4,731
Accrued expenses	1,499	1,618
Deferred revenue	113	97
Bank line of credit	2,800	0
Notes payable, current	1,709	0
Right-of-use obligations, current	1,275	0
Finance lease obligations, current	285	0
Other current liabilities	41	758
Total current liabilities	11,194	7,204
Non-current Liabilities
Note payable	2,440	0
Right-of-use obligations, current	3,310	0
Finance lease obligations, long-term	791	0
Other liabilities	15	177
Total liabilities	17,750	7,381
Shareholders’ equity:
Common stock, $.01 par value; 30,000,000 shares authorized; 11,822,009 and 10,861,950 shares issued, respectively; 11,822,009 and 10,361,292 shares outstanding, respectively	118	109
Paid in capital	(2,567)	(4,377)
Retained earnings	17,382	34,715
Treasury stock, zero and 500,658 shares, at cost at September 30, 2020 and 2019, respectively	0	(1,000)
Total shareholders’ equity	14,933	29,447
Total liabilities and shareholders’ equity	$ 32,683	$ 36,828

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss, current	$ 250	$ 150
Inventory valuation reserves	$ 3,054	$ 1,275
Common stock, par or stated value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock issuance (in shares)	11,822,009	10,861,950
Common stock, shares, outstanding (in shares)	11,822,009	10,361,292
Treasury stock, shares (in shares)	0	500,658
Other current liabilities	$ 41	$ 758
Total current liabilities	$ 11,194	$ 7,204

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Sales	$ 50,182	$ 55,118
Cost of sales	38,502	41,660
Gross profit	11,680	13,458
Operating expenses	8,166	6,364
Selling, general and administrative expense	11,249	9,962
Impairment of right-of-use asset	660	0
Impairment of intangibles including goodwill	8,714	0
Depreciation and amortization expense	1,554	1,453
Gain on disposal of assets	133	345
Loss from operations	(18,530)	(3,976)
Other income (expense):
Interest income	321	96
Interest expense	(254)	(80)
Income from equity method investment	41	136
Other expense	(160)	(224)
Other expense, net	(52)	(72)
Loss before income taxes	(18,582)	(4,048)
Income tax benefit	(1,249)	(13)
Loss from continuing operations	(17,333)	(4,035)
Loss from discontinued operations, net of tax	0	(1,267)
Net loss	$ (17,333)	$ (5,302)
Loss per share:
Continuing operations (in dollars per share)	$ (1.55)	$ (0.39)
Discontinued operations (in dollars per share)	0	(0.12)
Net loss (in dollars per share)	$ (1.55)	$ (0.51)
Shares used in per share calculation:
Basic and diluted (in shares)	11,163,660	10,361,292

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid in Capital	Retained Earnings	Treasury Stock
Balance (in shares) at Sep. 30, 2018		10,806,803
Balance at Sep. 30, 2018	$ 34,527	$ 108	$ (4,598)	$ 40,017	$ (1,000)
Net income (loss)	(5,302)			(5,302)
Common stock issuance (in shares)		55,147
Restricted stock issuance	75	$ 1	74
Amortization of stock-based compensation	147		147
Balance (in shares) at Sep. 30, 2019		10,861,950
Balance at Sep. 30, 2019	29,447	$ 109	(4,377)	34,715	(1,000)
Net income (loss)	(17,333)			(17,333)
Treasury stock, net (in shares)		(500,658)
Treasury stock, net	0	$ (5)	(995)		1,000
Common stock issuance (in shares)		573,199
Common stock issuance	2,109	$ 6	2,103
Restricted stock issuance (in shares)		764,184
Restricted stock issuance	$ (69)	$ 7	(76)
Stock options, exercised (in shares)	123,334	123,334
Stock option exercise	$ 205	$ 1	204
Amortization of stock-based compensation	574		574
Balance (in shares) at Sep. 30, 2020		11,822,009
Balance at Sep. 30, 2020	$ 14,933	$ 118	$ (2,567)	$ 17,382	$ 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net loss	$ (17,333)	$ (5,302)
Net loss from discontinued operations	0	(1,267)
Loss from continuing operations	(17,333)	(4,035)
Adjustments to reconcile net loss from continuing operations to net cash provided by (used in) operating activities:
Depreciation	868	368
Amortization	687	1,085
Non cash amortization of right-of-use asset and liability	225	0
Provision for excess and obsolete inventories	1,782	682
Charge for lower of cost or net realizable value inventories	60	656
Impairment of right-of-use asset	660	0
Impairment of intangibles including goodwill	8,714	0
Gain on disposal of property and equipment	(133)	(251)
Share based compensation expense	574	199
Income from equity method investment	(41)	(136)
Changes in operating assets and liabilities
Accounts receivable, net of change in allowance	859	(1,419)
Unbilled revenue	2,101	(2,253)
Income tax refund receivable\payable	(1,262)	158
Inventories	27	(1,591)
Prepaid expenses and other current assets	(147)	(206)
Other assets	(2)	1
Accounts payable	(1,259)	180
Accrued expenses	(220)	477
Deferred revenue	16	98
Net cash used in operating activities – continuing operations	(3,824)	(5,987)
Net cash provided by operating activities – discontinued operations	0	1,180
Net cash used in operating activities	(3,824)	(4,807)
Investing Activities
Proceeds from promissory note receivable	2,600	0
Acquisition of net operating assets	0	(1,264)
Proceeds from sale of business	0	753
Loan repayments from equity method investee	41	185
Purchases of property and equipment	(608)	(602)
Disposals of property and equipment	361	452
Net cash provided by (used in) investing activities – continuing operations	2,394	(476)
Net cash provided by investing activities – discontinued operations	0	7,075
Net cash provided by investing activities	2,394	6,599
Financing Activities
Change in bank revolving line of credit	2,800	(500)
Proceeds from notes payable	6,372	0
Proceeds from share issuances and exercise of stock options	2,315	0
Payments on debt	(3,278)	(2,228)
Net cash provided by (used in) financing activities – continuing operations	8,209	(2,728)
Net cash used in financing activities – discontinued operations	0	(598)
Net cash provided by (used in) financing activities	8,209	(3,326)
Net increase (decrease) in cash and cash equivalents and restricted cash	6,779	(1,534)
Cash and cash equivalents and restricted cash at beginning of year	1,595	3,129
Cash and cash equivalents and restricted cash at end of year	$ 8,374	$ 1,595

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization and basis of presentation The consolidated financial statements include the accounts of ADDvantage Technologies Group, Inc. and its subsidiaries, all of which are wholly owned (collectively, the “Company”). Intercompany balances and transactions have been eliminated in consolidation. The Company’s reportable segments are Wireless Infrastructure Services (“Wireless”) and Telecommunications (“Telco”). The Cable Television (“Cable TV”) segment was sold on June 30, 2019, so the Company has classified the Cable TV segment as discontinued operations (see Note 4 – Discontinued Operations) in 2019. Other reclassifications The Company changed its presentation of cost of sales and operating, selling, general and administrative expenses on the unaudited consolidated condensed statements of operations. During fiscal year 2020, the Company reviewed its financial reporting of expenses in connection with its current operating segments in order to enhance the usefulness of the presentation of the Company’s expenses. Based on that review, the Company reclassified certain expenses into operating expenses for presentation purposes. Operating expenses include the indirect costs associated with operating our businesses. Indirect costs are costs that are not directly attributable to projects or products, which would include indirect personnel costs, facility costs, vehicles, insurance, communication, and business taxes, among other less significant cost categories. These costs were previously recorded in either costs of sales or operating, selling, general and administrative expenses in prior years. Additionally, the Company reclassified depreciation and amortization from operating, selling, general and administrative expenses into its own financial statement line item in the consolidated statements of operations. Selling, general and administrative expenses include overhead costs, which primarily consist of personnel costs, insurance, professional services, and communication, among other less significant cost categories. The prior year has been reclassified to conform with the current year’s presentation of costs of sales, operating expenses, selling, general and administrative expenses, and depreciation and amortization. These reclassifications had no effect on previously reported results of operations or retained earnings. Cash, cash equivalents and restricted cash Cash and cash equivalents include demand and time deposits, money market funds and other marketable securities with maturities of three months or less when acquired. Restricted cash consists of cash held by a third-party financial institution as a reserve in connection with an agreement to sell certain receivables with recourse in the Wireless segment, see Note 5 - Accounts Receivable Agreements. Revenue recognition The Company recognizes revenue at the time a good or service is transferred to a customer and the customer, obtains control of that good or receives the service performed. Most of the Company’s sales arrangements with customers are short-term in nature involving single performance obligations related to the delivery of goods or repair of equipment and generally provide for transfer of control at the time of shipment to the customer. The Company generally permits returns of product or repaired equipment due to defects, historically, returns have not been significant. Additionally, the Company provides services related to the installation and upgrade of technology on cell sites and the construction of new small cells for 5G technology. The work under the purchase orders for wireless infrastructure services are generally completed in less than a month. These services generally consist of a single performance obligation which the Company recognizes as revenue over time. The Company’s principal sales are from Wireless services, sales of Telco equipment and Telco recycled equipment. The Company’s customers include wireless carriers, wireless equipment providers, multiple system operators, resellers and direct sales to end-user customers. The timing of revenue recognition from the wireless segment results in contract assets and contract liabilities. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, the Company sometimes receives advances or deposits from customers before revenue is recognized, resulting in contract liabilities. Contract assets and contract liabilities are included in Unbilled revenue and Deferred revenue, respectively, on the consolidated balance sheets. Accounts receivable Trade receivables are carried at original invoice amount less an estimate made for doubtful accounts. Management determines the allowance for doubtful accounts by regularly evaluating individual customer receivables and considering a customer’s financial condition, credit history and current economic conditions. Trade receivables are written off against the allowance when deemed uncollectible. Recoveries of trade receivables previously written off are recorded when received. The Company generally does not charge interest on past due accounts. For the Company’s Wireless segment, the Company has entered into various agreements, one with recourse, to sell certain receivables to unrelated third-party financial institutions. The other agreements without recourse are under programs offered by certain customers of the Wireless segment. The Company accounts for these transactions in accordance with Accounting Standards Codification (“ASC”) 860, “Transfers and Servicing” (“ASC 860”). ASC 860 allows for the ownership transfer of accounts receivable to qualify for sale treatment when the appropriate criteria is met, which permits the Company to present the balances sold under the program to be excluded from accounts receivable, net on the consolidated balance sheet. Receivables are considered sold when they are transferred beyond the reach of the Company and its creditors, the purchaser has the right to pledge or exchange the receivables and the Company has surrendered control over the transferred receivables. The Company records a recourse obligation if it determines that any portion of the sold receivables with recourse are uncollectible. Inventories For the Telco segment, inventories consist of new, refurbished and used telecommunications equipment. Inventory is stated at the lower of cost or net realizable value. Cost is determined using the weighted-average method. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. For the Telco segment, the Company records an inventory reserve provision to reflect inventory at its estimated net realizable value based on a review of inventory quantities on hand, historical sales volumes and technology changes. These reserves are to provide for items that are potentially slow-moving, excess or obsolete. Leases The Company determines if an arrangement is a lease at inception of the arrangement. To the extent that we determine an arrangement represents a lease, we classify that lease as either a right-of-use ("ROU") lease or a finance lease. We capitalize ROU leases on our consolidated balance sheets through a right-of-use asset and a corresponding right-of-use lease liability. ROU assets represent our right to use an underlying asset for the lease term and ROU lease liabilities represent our obligation to make lease payments arising from the lease. ROU leases are included in long-term assets and ROU lease liabilities are classified as either current or long-term liabilities in our consolidated balance sheets. ROU assets and liabilities are recognized at the commencement date of an arrangement based on the present value of lease payments over the lease term. Lease expense for ROU lease payments is recognized on a straight-line basis over the lease term. ADDvantage adopted this standard on October 1, 2019. Property and equipment Property and equipment consist of software, office equipment, wireless services equipment and warehouse and service equipment with estimated useful lives generally of 3 years, 5 years, 7 years, and 10 years, respectively. The wireless services equipment includes mobile wireless temporary towers, equipment trailers and construction equipment. Depreciation is provided using the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the useful lives or the remainder of the lease agreement. Gains or losses from the ordinary sale or retirement of property and equipment are recorded are included in operating expense. Repairs and maintenance costs are generally expensed as incurred, whereas major improvements are capitalized. Depreciation expense was $0.9 million and $0.4 million for the years ended September 30, 2020 and 2019, respectively. Goodwill Goodwill represents the excess of purchase price of acquisitions over the acquisition date fair value of the net assets of businesses acquired. Goodwill is not amortized and is tested at least annually for impairment. The Company performs its annual analysis during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional analysis. Goodwill is evaluated for impairment by comparing the estimate of the fair value of each reporting unit, or operating segment, with the reporting unit’s carrying value, including goodwill. The reporting units for purposes of the goodwill impairment calculation are aggregated into the Wireless segment and ADDvantage Triton LLC (Triton) operating segment, and Nave Communications Company (Nave) operating segment. Management utilizes a discounted cash flow analysis to determine the estimated fair value of each reporting unit. Significant judgments and assumptions including the discount rate, anticipated revenue growth rate, gross margins and operating expenses are inherent in these fair value estimates. As a result, actual results may differ from the estimates utilized in the discounted cash flow analysis. The use of alternate judgments and/or assumptions could result in the recognition of different levels of impairment charges in the financial statements. During the year ended September 30, 2020, due to operating losses and uncertainties surrounding the impact of the COVID-19 pandemic on the overall economy and the resulting impact on the capital budgets of both Customers and our Company, we determined that impairment indicators were present. The Company performed a valuation using a discounted cash flow analysis for the Nave and Triton operating segments to determine if the fair value exceeded their respective carrying values. For both Nave and Triton, the fair value for each was less than their respective carrying values. Therefore, the Company recorded an impairment charges of $4.8 million as of March 31, 2020, which fully impaired goodwill for both operating segments in the Telco segment. Although the Company does not anticipate a future impairment charge, certain events could occur that might adversely affect the reported value of the remaining goodwill in the Wireless segment, which was $0.1 million at September 30, 2020. Intangible assets Intangible assets consist of customer relationships, trade names, and intellectual property. Intangibles assets that have finite useful lives are amortized on a straight-line basis over their estimated useful lives ranging from 3 years to 10 years. Impairment of long-lived assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the asset’s carrying amount may not be recoverable. The Company conducts its long-lived asset impairment analyses in accordance with ASC 360-10-15, “Impairment or Disposal of Long-Lived Assets.” ASC 360-10-15 requires the Company to group assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities and evaluate the asset group against the sum of the undiscounted future cash flows. If the undiscounted cash flows do not indicate the carrying amount of the asset is recoverable, an impairment charge is measured as the amount by which the carrying amount of the asset group exceeds its fair value based on discounted cash flow analysis or appraisals. Income taxes The Company provides for income taxes in accordance with the liability method of accounting. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and tax carryforward amounts. Management provides a valuation allowance against deferred tax assets for amounts which are not considered “more likely than not” to be realized. Advertising costs Advertising costs are expensed as incurred. Advertising expense was $0.5 million and $0.6 million for the years ended September 30, 2020 and 2019, respectively. Management estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Any significant, unanticipated changes in product demand, technological developments or continued economic trends affecting the wireless infrastructure or telecommunications industries could have a significant impact on the value of the Company's inventory and operating results. Concentrations of risk The Company holds cash with one major financial institution, which at times exceeds FDIC insured limits. Historically, the Company has not experienced any losses due to such concentration of credit risk. Other financial instruments that potentially subject the Company to concentration of credit risk consist principally of trade receivables. Concentrations of credit risk with respect to trade receivables are limited because a large number of geographically diverse customers make up the Company’s customer base, thus spreading the trade credit risk. The Company controls credit risk through credit approvals, credit limits and monitoring procedures. The Company performs credit evaluations for all new customers but does not require collateral to support customer receivables. Share-based compensation ADDvantage has historically compensated our directors and executives using time-based stock options and restricted shares awards (RSA's). ADDvantage accounts for share-based payment awards under ASC 718 - Compensation - Stock Compensation (ASC 718) , which requires that the value of the awards is established at the date of the grant and is expensed over the vesting period of the grant. The method of determining the fair value of share-based payments depends on the type of award. Share-based awards that vest over a certain service period with no market conditions are valued at the closing market price on the grant date. Option grants are valued using the Black-Scholes-Merton model using model inputs that are determined on the date of the grant. Once the per-share fair value on the grant date is established, the aggregate expense of the grant is recognized on a graded vesting basis over the vesting period of the grant. Fair value of financial instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities approximate fair value due to their short maturities. The carrying value of the Company’s variable-rate line of credit approximates its fair value since the interest rate fluctuates periodically based on a floating interest rate. Retirement Plan The Company sponsors a 401(k) plan that allows participation by all employees who are at least 21 years of age and have completed one year of service. The Company's contributions to the plan consist of a matching contribution as determined by the plan document. Costs recognized under the 401(k) plan were $0.1 million and, $0.3 million for the years ended September 30, 2020 and September 30, 2019, respectively, after temporarily suspending matching contributions during 2020. Recently issued accounting standards In June 2016, the FASB issued ASU 2016-13: “Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments.” This ASU requires entities to measure all expected credit losses for most financial assets held at the reporting date based on an expected loss model which includes historical experience, current conditions, and reasonable and supportable forecasts. Entities will now use forward-looking information to better form their credit loss estimates. This ASU also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity’s portfolio. ASU 2016-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal periods. ADDvantage expects to adopt the standard in the first quarter of fiscal year 2021. Management's initial evaluation is that due to the nature of our customer base, the adoption of this standard will not have a significant impact on our trade accounts receivable and contract assets.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company’s principal sales are from Wireless services, sales of Telco equipment and Telco recycled equipment, primarily in the United States. Sales to international customers in Central and South America totaled approximately $1.9 million and $2.4 million in the years ended September 30, 2020 and 2019, respectively. The Company’s customers include wireless carriers, wireless equipment providers, multiple system operators, resellers and direct sales to end-user customers. Sales to the Company’s largest customer totaled approximately 14% of consolidated sales. Sales by type were as follows, in thousands: Years Ended September 30, 2020 2019 Wireless services sales $ 21,354 $ 22,919 Equipment sales: Telco 27,109 29,391 Inter-segment (25) (55) Telco repair sales 68 43 Telco recycle sales 1,676 2,820 Total sales $ 50,182 $ 55,118 At September 30, 2020 contract assets were $0.6 million and contract liabilities were $0.1 million. There were $2.7 million in contract assets at September 30, 2019, and $0.1 million contract liabilities at September 30, 2019. During the year ended September 30, 2020, the Company recognized $0.1 million of amounts classified as deferred revenue on our consolidated balance sheet at September 30, 2019.

2019 Acquisition

2019 Acquisition	12 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
2019 Acquisition	2019 Acquisition Purchase of Net Assets of Fulton Technologies, Inc. and Mill City Communications, Inc. On December 27, 2018, the Company entered into a purchase agreement to acquire substantially all of the net assets of Fulton Technologies, Inc. and Mill City Communications, Ins. (collectively “Fulton”). Fulton provides turn-key wireless infrastructure services for the four major U.S. wireless carriers, communication tower companies, national integrators, and original equipment manufacturers. These services primarily consist of the installation and upgrade of technology on cell sites and the construction of new small cells for 5G. This agreement closed on January 4, 2019. The purchase price for the net assets of Fulton was $1.3 million. The purchase price was allocated to the major categories of assets and liabilities based on their estimated fair values as of January 4, 2019, the effective date of the acquisition. The Company recorded $0.1 million of Goodwill related to the acquisition. The following summarizes the final purchase price allocation of the fair value of the assets acquired and the liabilities assumed at January 4, 2019, in thousands: Assets acquired: Accounts receivable $ 828 Unbilled revenue 438 Prepaid expenses 341 Property and equipment 1,201 Intangible assets 244 Other assets 35 Goodwill 57 Total assets acquired 3,144 Liabilities assumed: Accounts payable 1,250 Accrued expenses 455 Capital lease obligation 175 Total liabilities assumed 1,880 Net purchase price $ 1,264 The acquired intangible asset of approximately $0.2 million consists of customer relationships. The unaudited financial information in the table below summarizes the combined results of operations of ADDvantage Technologies Group, Inc. and Fulton for the year ended September 30, 2019, on a pro forma basis, as though the companies had been combined as of October 1, 2019. The unaudited pro forma financial information does not purport to be indicative of the Company’s combined results of operations which would actually have been obtained had the acquisition taken place on October 1, 2019 nor should it be taken as indicative of future consolidated results of operations. (Unaudited) Year Ended (in thousands) September 30, 2019 Total net sales $ 58,955 Loss from continuing operations $ (4,461) Net loss $ (5,728)

Discontinued Operations

Discontinued Operations	12 Months Ended
	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations In fiscal year 2018, the Board of Directors formed a committee of independent directors, referred to as the strategic direction committee, to consider, negotiate and approve or disapprove a sale transaction of the Cable TV segment ("Cable transaction") to Leveling 8, Inc. (“Leveling 8”), a company controlled by David Chymiak. Mr. Chymiak is a director and substantial shareholder of the Company, and he was the Chief Technology Officer and President of Tulsat LLC until the closing of the sale. After extensive due diligence efforts, in December 2018, the strategic direction committee approved and executed a stock purchase agreement of the Cable TV segment to Leveling 8, which required stockholder approval. Shareholders voted in favor of the Cable transaction on May 29, 2019 for a selling price of $10.3 million and the sale was completed on June 30, 2019. The purchase price consisted of $3.9 million of cash at closing (subject to a working capital adjustment estimated at $1.1 million), less the $2.1 million of cash proceeds from the sale of the Sedalia, Missouri and Warminster, Pennsylvania facilities already received (see discussion below) and a $6.4 million promissory note to be paid in semi-annual installments over five years with an interest rate of 6.0%. The calculation of the pretax loss of the Cable transaction was as follows, in thousands: Contract price $ 10,314 Less: Real estate sales 2,075 Less: Working capital adjustment 1,111 Net purchase price 7,128 Assets sold: Accounts receivable 2,038 Inventories 10,259 Prepaids and other assets 73 Property and equipment, net 336 12,706 Liabilities transferred: Accounts payable 1,306 Accrued expenses 467 1,773 Net assets sold 10,933 Pretax loss on sale of net assets of Cable TV segment $ (3,805) In addition to the real estate sold as part of the Cable transaction, the Company sold the Broken Arrow, Oklahoma facility to Mr. Chymiak, for a purchase price of $5.0 million payable in cash at closing. The sale closed on November 29, 2018, and generated a pretax gain of approximately $1.4 million. The total pretax gain related to the sale of all real estate facilities, including the Cable transaction and the Broken Arrow facility, is as follows, in thousands: Aggregate purchase price $ 7,075 Less: Book value of real estate facilities 4,763 Pretax gain $ 2,312 As a result of the Cable transaction and the three real estate facility sales to David Chymiak, the Company received total proceeds of $14.2 million and recorded a pretax loss on the sales of $1.5 million for the year ended September 30, 2019 as follows, in thousands: Proceeds: Cash received from real estate facility sales $ 7,075 Cash received from sale of Cable TV segment 753 Promissory note from sale of Cable TV segment 6,375 Total proceeds 14,203 Book value of assets sold: Cable TV segment 10,932 Real estate facilities 4,763 Total book value of assets sold 15,695 Pretax loss on sale of discontinued operations $ (1,492) The cash received from the Cable transaction of $0.7 million resulted from the down payment of $1.8 million due at the closing less the working capital adjustment of $1.1 million. The Company received $2.6 million under the promissory note during the year ended September 30, 2020. The remaining promissory note, which is collateral under the Company's note payable with its primary lender, is scheduled to be received by the Company in semi-annual installments over five years including interest of 6% as follows, in thousands: Fiscal year 2021 $ 1,400 Fiscal year 2022 940 Fiscal year 2023 940 Fiscal year 2024 495 Total proceeds $ 3,775 The Company did not have income related to the discontinued operations during the year ended September 30, 2020. Loss from discontinued operations, net of tax and the loss on sale of discontinued operations, net of tax, of the Cable TV segment business which are presented in total as loss from discontinued operations, net of tax in the Company’s consolidated statements of operations for the year ended September 30, 2019 is as follows, in thousands: September 30, 2019 Total net sales $ 13,743 Cost of sales 10,097 Operating, selling, general and administrative expenses 3,412 Other expenses 2 Income from discontinued operations 232 Loss on sale of discontinued operations (1,491) Income tax provision 8 Loss from discontinued operations, net of tax $ (1,267)

Accounts Receivable Agreements

Accounts Receivable Agreements	12 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Accounts Receivable Agreements	Accounts Receivable AgreementsThe Company’s Wireless segment has entered into various agreements, one agreement with recourse, to sell certain receivables to unrelated third-party financial institutions. For the agreement with recourse, the Company is responsible for collecting payments on the sold receivables from its customers. Under this agreement, the third-party financial institution advances the Company 90% of the sold receivables and establishes a reserve of 10% of the sold receivables until the Company collects the sold receivables. In addition, the third party financial institution will charge and deduct 1.6% of sold receivables. As the Company collects the sold receivables, the third-party financial institution will remit the remaining 10% to the Company. At September 30, 2020, the third-party financial institution has a reserve against the sold receivables of $0.1 million, which is reflected as restricted cash. For the receivables sold under the agreement with recourse, the agreement addresses events and conditions which may obligate the Company to immediately repay the institution the outstanding purchase price of the receivables sold. The total amount of receivables uncollected by the institution was $0.6 million at September 30, 2020, for which there is a limit of $3.5 million. Although the sale of receivables is with recourse, the Company did not record a recourse obligation at September 30, 2020 as the Company determined the sold receivables are collectible. The other agreements without recourse are under programs offered by certain customers of Fulton. For the year ended September 30, 2020, the Company received proceeds from the sold receivables under all of their various agreements of $18.9 million and included the proceeds in net cash provided by operating activities in the consolidated statements of cash flows. The cost of selling these receivables ranges from 1.0% to 1.8%. The Company recorded costs of $0.3 million for the year ended September 30, 2020, in other expense in the consolidated statements of operations.

Inventories

Inventories	12 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories, which are all within the Telco segment, at September 30, 2020 and September 30, 2019 are as follows, in thousands: 2020 2019 New equipment $ 1,311 $ 1,496 Refurbished and used equipment 7,499 7,405 Allowance for excess and obsolete inventory: (3,054) (1,275) Total inventories, net $ 5,756 $ 7,626 New equipment includes products purchased from manufacturers plus “surplus-new”, which are unused products purchased from other distributors or multiple system operators. Refurbished and used equipment includes factory refurbished, Company refurbished and used products. Generally, the Company does not refurbish its used inventory until there is a sale of that product or to keep a certain quantity on hand. In the years ended September 30, 2020 and 2019, the Telco segment identified certain inventory that more than likely will not be sold or that the cost will not be recovered when it is processed through its recycling program. Therefore, the Company has a $3.1 million allowance at September 30, 2020. The Company also reviewed the cost of inventories against estimated net realizable value and recorded a lower of cost or net realizable value charge of $1.8 million and $0.7 million for the years ended September 30, 2020 and 2019 respectively, for inventories that have a cost in excess of estimated net realizable value.

Intangible Assets

Intangible Assets	12 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the asset’s carrying amount may not be recoverable. The Company groups assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities and evaluate the asset group against the sum of the undiscounted future cash flows. If the undiscounted future cash flows do not indicate the carrying amount of the asset is recoverable, an impairment charge is measured as the amount by which the carrying amount of the asset group exceeds its fair value based on discounted cash flow analysis or appraisals. As a result of the Fulton acquisition, the Company recorded an additional intangible asset for customer relationships of $0.2 million, see Note 3 ‒ Acquisition. The intangible assets with their associated accumulated amortization amounts at September 30, 2020 and September 30, 2019 are as follows, in thousands: September 30, 2020 Gross Accumulated Impairment Net Intangible assets: Customer relationships – 10 years $ 8,396 $ (4,021) $ (3,894) $ 481 Trade name – 10 years 2,122 (1,178) — 944 Non-compete agreements – 3 years 374 (374) — — Total intangible assets $ 10,892 $ (5,573) $ (3,894) $ 1,425 September 30, 2019 Gross Accumulated Impairment Net Intangible assets: Customer relationships – 10 years $ 8,396 $ (3,548) $ — $ 4,848 Trade name – 10 years 2,119 (966) — 1,153 Non-compete agreements – 3 years 374 (372) — 2 Total intangible assets $ 10,889 $ (4,886) $ — $ 6,003 As of March 31, 2020, the Company determined that changes in the economy related to the COVID-19 pandemic and the continued losses experienced in the Telco segment may cause the carrying amounts of its intangible assets to exceed their fair values. The Company performed an assessment of its intangible assets and determined that the carrying value of its customer relationships were in fact impaired based on valuation appraisals performed by the Company using a multi-period excess earnings model. Therefore, the Company recorded a $3.9 million impairment charge in the Telco segment as of March 31, 2020. As of September 30, 2020, no further indicators of potential impairment were present. Amortization expense was $0.7 million and $1.1 million for the years ended September 30, 2020 and 2019, respectively. The estimated aggregate amortization expense for each of the next five fiscal years is as follows, in thousands: 2021 $ 319 2022 319 2023 319 2024 195 2025 107 Thereafter 166 Total $ 1,425

Accrued Expenses

Accrued Expenses	12 Months Ended
	Sep. 30, 2020
Payables and Accruals [Abstract]
Accrued Expenses	Accrued Expenses Accrued expenses at September 30, 2020 and 2019 are as follows, in thousands: 2020 2019 Employee costs $ 942 $ 1,192 Taxes other than income tax 91 69 Interest 23 — Other, net 443 357 Total accrued expenses $ 1,499 $ 1,618

Debt

Debt	12 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Debt	Debt Loan Agreement On March 10, 2020, the Company entered into a loan agreement with its primary lender for $3.5 million, bearing interest at 6% per annum. The loan is payable in seven semi-annual installments of principal and interest with the first payment occurring June 30, 2020, and the final payment due June 30, 2023. Payment of the loan may be accelerated in the event of a default. The principal and interest payments correlate to the payment schedule for the promissory note with Leveling 8. The balance under this loan is now $1.2 million and the final payment will be June 30, 2023. The loan is secured by substantially all of the assets of the Company, including, without limitation, the promissory note that the Company received in connection with the sale of its Cable TV segment in 2019 to Leveling 8, Inc. Line of Credit and Notes Payable Credit Agreement The Company has a line of credit ("LOC") agreement with its primary lender. This credit agreement contains a $4.0 million revolving line of credit and had a maturity date of December 17, 2020. The Company renewed the line of credit for another year subsequent to September 30, 2020. During the fiscal year 2020, the line of credit required quarterly interest payments based on the prevailing Wall Street Journal Prime Rate ("WSJP") (3.25% at September 30, 2020), and the interest rate was reset monthly. The credit agreement provides that the Company maintain a fixed charge coverage ratio of not less than 1.25 to 1.00 measured annually. At September 30, 2020, the Company was not in compliance with this ratio. At September 30, 2020, there was $2.8 million outstanding under the line of credit. Future borrowings under the line of credit are limited to the lesser of $4.0 million or the sum of 80% of eligible accounts receivable and 60% of eligible Telco segment inventory. Under these limitations, the Company’s total line of credit borrowing capacity was $3.3 million at September 30, 2020, and remaining availability was $0.5 million. Subsequent to September 30, 2020, the Company renewed its revolving bank line of credit for one year to a maturity date of December 17, 2021. As part of this renewal, the revolving bank line of credit remained $4.0 million, or the sum of 80% of eligible accounts receivable and 25% of eligible inventory. Quarterly interest payments are based on WSJP, floating, with the addition of a 4% floor rate and a fixed charge coverage ratio of 1.25 to be tested quarterly beginning June 30, 2021. Paycheck Protection Program Loan On April 14, 2020, the Company received a SBA Payroll Protection Program (“PPP”) loan pursuant to the Paycheck Protection Program under the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”), with its primary lender for $2.9 million. The PPP loan bears interest at 1% per annum, with monthly payments of principal and interest in the amount of $164,045 commencing on November 10, 2020, and matures on April 10, 2022. The Paycheck Protection Program provides that the PPP loan may be partially or fully forgiven if the funds are used for certain qualifying expenses as described in the CARES Act. The Company has applied for forgiveness of the PPP loan in accordance with the requirements and limitations under the CARES Act, the PPP Flexibility Act and SBA regulations and requirements. As of September 30, 2020, the aggregate maturities of debt for the next five years and thereafter are as follows (in thousands): 2021 $ 4,509 2022 2,440 Thereafter — Total $ 6,949

Leases

Leases	12 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	Leases ADDvantage adopted ASU No. 2016-02, Topic 842 (ASC 842) - Leases, effective October 1, 2019. This ASU requires lessees to recognize an operating lease or right-of-use ("ROU") asset and liability on the balance sheet for all right-of-use leases with an initial lease term greater than twelve months. ASU 2018-11 Leases – Targeted Improvements, allows for a practical expedient wherein all periods previously reported under ASC 840 will continue to be reported under ASC 840, and periods beginning October 1, 2019 and after are reported under ASC 842. ADDvantage elected to adopt this practical expedient along with the package of practical expedients, which allows the Company to combine lease and non-lease costs. Under this transition option, ADDvantage will continue to apply the legacy guidance in ASC 840, including its disclosure requirements, in the comparative periods presented and will make only annual disclosures for the comparative periods because ASC 840 does not require interim disclosures. Prior period amounts have not been adjusted and continue to be reflected in accordance with ADDvantage historical accounting. The adoption of this standard on October 1, 2019, had no impact on the Company's consolidated statement of shareholders' equity or consolidated statement of operations. As a lessee, ADDvantage leases its corporate office headquarters in Carrollton, Texas, and conducts its business operations through various regional offices located throughout the United States. These operating locations typically include regional offices, storage and maintenance facilities sufficient to support its operations in the area. ADDvantage leases these properties under either non-cancelable term leases many of which contain renewal options that can extend the lease term from one ROU lease expense consists of rent expense related to leases that were included in ROU assets under ASC 842. ADDvantage recognizes right-of-use lease expense on a straight-line basis, except for certain variable expenses that are recognized when the variability is resolved, typically during the period in which they are paid. Variable right-of-use lease payments typically include charges for property taxes and insurance, and some leases contain variable payments related to non-lease components, including common area maintenance and usage of facilities or office equipment (for example, copiers). As a result of adopting ASC 842, on the effective date, the Company recognized right-of-use assets and liabilities of $4.6 million, and financing lease assets and liabilities of $1.4 million. Right-of-use leases are included in right-of-use assets and current or long-term right-of-use obligations on the consolidated balance sheets. Finance leases are included in net property and equipment, and current or long-term finance lease obligations in the consolidated balance sheets. Right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The Company uses a discount rate that approximates the rate of interest for a collateralized loan over a similar term as the discount rate for present value of lease payments when the rate implicit in the contract is not readily determinable. Impairment of right-of-use asset - The Company has a right-of-use for a building in Jessup, Maryland for Nave Communications. The Company ceased operations in Jessup, Maryland in May 2020, and vacated the Jessup, Maryland building. The building was partially subleased during fiscal year 2020. During the third quarter of 2020, the Company determined that the right-of-use asset was not recoverable and used an income approach to estimate its fair value, determining that the carrying value was partially impaired. Therefore, the Company recorded $0.7 million of impairment charges related to the lease in the Telco segment during the year ended September 30, 2020. The components of lease expense were as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Right-of-use lease cost Impairment of right-of-use asset $ 660 Right-of-use lease cost 1,586 Total right-of-use lease cost $ 2,246 Finance lease costs Amortization assets under finance leases $ 335 Interest on finance lease liabilities 59 Total finance lease cost $ 394 Supplemental cash flow information related to leases are as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from right-of-use leases $ 1,586 Operating cash flows from finance leases $ 59 Financing cash flows from finance leases $ 387 Supplemental balance sheet information related to leases are as follows, in thousands: September 30, 2020 Right-of-use leases Right-of-use lease assets $ 3,758 Right-of-use lease obligations - current $ 1,275 Right-of-use lease obligations 3,310 Total right-of-use lease liabilities $ 4,585 Finance leases Property and equipment, gross $ 1,463 Accumulated depreciation (393) Property and equipment, net $ 1,070 Financing lease obligations - current $ 285 Financing lease obligations 791 Total finance lease liabilities $ 1,076 Weighted Average Remaining Lease Term Right-of-use leases 3.75 years Finance leases 3.88 years Weighted Average Discount Rate Right-of-use leases 5.00% Finance leases 4.96% Maturities of lease liabilities are as follows for the year ending September 30, 2020, in thousands: Right-of-Use Leases Finance Leases 2021 $ 1,441 $ 325 2022 1,341 292 2023 1,328 278 2024 802 234 2025 150 44 Total lease payments 5,062 1,173 Less imputed interest 477 98 Total lease obligations $ 4,585 $ 1,075
Leases	Leases ADDvantage adopted ASU No. 2016-02, Topic 842 (ASC 842) - Leases, effective October 1, 2019. This ASU requires lessees to recognize an operating lease or right-of-use ("ROU") asset and liability on the balance sheet for all right-of-use leases with an initial lease term greater than twelve months. ASU 2018-11 Leases – Targeted Improvements, allows for a practical expedient wherein all periods previously reported under ASC 840 will continue to be reported under ASC 840, and periods beginning October 1, 2019 and after are reported under ASC 842. ADDvantage elected to adopt this practical expedient along with the package of practical expedients, which allows the Company to combine lease and non-lease costs. Under this transition option, ADDvantage will continue to apply the legacy guidance in ASC 840, including its disclosure requirements, in the comparative periods presented and will make only annual disclosures for the comparative periods because ASC 840 does not require interim disclosures. Prior period amounts have not been adjusted and continue to be reflected in accordance with ADDvantage historical accounting. The adoption of this standard on October 1, 2019, had no impact on the Company's consolidated statement of shareholders' equity or consolidated statement of operations. As a lessee, ADDvantage leases its corporate office headquarters in Carrollton, Texas, and conducts its business operations through various regional offices located throughout the United States. These operating locations typically include regional offices, storage and maintenance facilities sufficient to support its operations in the area. ADDvantage leases these properties under either non-cancelable term leases many of which contain renewal options that can extend the lease term from one ROU lease expense consists of rent expense related to leases that were included in ROU assets under ASC 842. ADDvantage recognizes right-of-use lease expense on a straight-line basis, except for certain variable expenses that are recognized when the variability is resolved, typically during the period in which they are paid. Variable right-of-use lease payments typically include charges for property taxes and insurance, and some leases contain variable payments related to non-lease components, including common area maintenance and usage of facilities or office equipment (for example, copiers). As a result of adopting ASC 842, on the effective date, the Company recognized right-of-use assets and liabilities of $4.6 million, and financing lease assets and liabilities of $1.4 million. Right-of-use leases are included in right-of-use assets and current or long-term right-of-use obligations on the consolidated balance sheets. Finance leases are included in net property and equipment, and current or long-term finance lease obligations in the consolidated balance sheets. Right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The Company uses a discount rate that approximates the rate of interest for a collateralized loan over a similar term as the discount rate for present value of lease payments when the rate implicit in the contract is not readily determinable. Impairment of right-of-use asset - The Company has a right-of-use for a building in Jessup, Maryland for Nave Communications. The Company ceased operations in Jessup, Maryland in May 2020, and vacated the Jessup, Maryland building. The building was partially subleased during fiscal year 2020. During the third quarter of 2020, the Company determined that the right-of-use asset was not recoverable and used an income approach to estimate its fair value, determining that the carrying value was partially impaired. Therefore, the Company recorded $0.7 million of impairment charges related to the lease in the Telco segment during the year ended September 30, 2020. The components of lease expense were as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Right-of-use lease cost Impairment of right-of-use asset $ 660 Right-of-use lease cost 1,586 Total right-of-use lease cost $ 2,246 Finance lease costs Amortization assets under finance leases $ 335 Interest on finance lease liabilities 59 Total finance lease cost $ 394 Supplemental cash flow information related to leases are as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from right-of-use leases $ 1,586 Operating cash flows from finance leases $ 59 Financing cash flows from finance leases $ 387 Supplemental balance sheet information related to leases are as follows, in thousands: September 30, 2020 Right-of-use leases Right-of-use lease assets $ 3,758 Right-of-use lease obligations - current $ 1,275 Right-of-use lease obligations 3,310 Total right-of-use lease liabilities $ 4,585 Finance leases Property and equipment, gross $ 1,463 Accumulated depreciation (393) Property and equipment, net $ 1,070 Financing lease obligations - current $ 285 Financing lease obligations 791 Total finance lease liabilities $ 1,076 Weighted Average Remaining Lease Term Right-of-use leases 3.75 years Finance leases 3.88 years Weighted Average Discount Rate Right-of-use leases 5.00% Finance leases 4.96% Maturities of lease liabilities are as follows for the year ending September 30, 2020, in thousands: Right-of-Use Leases Finance Leases 2021 $ 1,441 $ 325 2022 1,341 292 2023 1,328 278 2024 802 234 2025 150 44 Total lease payments 5,062 1,173 Less imputed interest 477 98 Total lease obligations $ 4,585 $ 1,075

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation Plan Information The 2015 Incentive Stock Plan (the “Plan”) provides for awards of stock options and restricted stock to officers, directors, key employees and consultants. Under the Plan, option prices will be set by the Compensation Committee and may not be less than the fair market value of the stock on the grant date. At September 30, 2020, 2,100,415 shares of common stock were reserved for stock award grants under the Plan. Of these reserved shares, 789,630 shares were available for future grants. Stock Options All share-based payments to employees, including grants of employee stock options, are recognized in the consolidated financial statements based on their grant date fair value over the requisite service period. Compensation expense for stock-based awards is included in the operating, selling, general and administrative expense section of the consolidated statements of operations. Stock options are valued at the date of the award, which does not precede the approval date, and compensation cost is recognized on a straight-line basis over the vesting period. Stock options granted to employees generally become exercisable three, four A summary of the status of the Company's stock options at September 30, 2020 and changes during the year then ended is presented below in thousands, except share and per share amounts: Options (Shares) Weighted Average Aggregate Outstanding at September 30, 2019 770,000 $ 1.73 $ 353 Granted — — — Exercised (123,334) 1.67 304 Expired — — — Forfeited (546,666) — 606 Outstanding at September 30, 2020 100,000 $ 1.55 $ 38 Exercisable at September 30, 2020 66,667 $ 1.68 $ 16 The intrinsic value of exercised options for the years ended September 30, 2020 and 2019, in thousands: 2020 2019 Value at exercise date $ 510 $ — Exercise price 206 — Intrinsic value $ 304 $ — Information about the Company’s outstanding and exercisable stock options at September 30, 2020 is as follows, in thousands except share and per share amounts: Exercise Price Stock Options Exercisable Remaining Contractual Life Aggregate $ 1.28 50,000 16,667 8.25 $ 32 $ 1.81 50,000 50,000 6.42 6 100,000 66,667 $ 38 The Company granted nonqualified stock options of zero and 480,000 options for the years ended September 30, 2020 and 2019, respectively. The Company estimated the fair value of the options granted using the Black-Scholes option valuation model and the assumptions shown in the table below. The Company estimated the expected term of options granted based on the historical grants and exercises of the Company's options. The Company estimated the volatility of its common stock at the date of the grant based on both the historical volatility as well as the implied volatility on its common stock. The Company based the risk-free rate that was used in the Black-Scholes option valuation model on the implied yield in effect at the time of the option grant on U.S. Treasury zero-coupon issues with equivalent expected terms. The Company has never paid cash dividends on its common stock and does not anticipate paying any cash dividends in the foreseeable future. Consequently, the Company used an expected dividend yield of zero in the Black-Scholes option valuation model. The Company amortizes the resulting fair value of the options ratably over the vesting period of the awards. The Company used historical data to estimate the pre-vesting options forfeitures and records share-based expense only for those awards that are expected to vest. The estimated fair value at date of grant for stock options utilizing the Black-Scholes option valuation model and the assumptions that were used in the Black-Scholes option valuation model for the fiscal year 2019 stock option grants are as follows: Estimated fair value of options at grant date $196,970 Black-Scholes model assumptions: Average expected life (years) 6 Average expected volatile factor 29% Average risk-free interest rate 2.8% Average expected dividend yield — The Company realized a net benefit related to the recognition of forfeitures of stock options during the year ended September 30, 2020. Compensation expense related to stock options recorded for the years ended September 30, 2020 and 2019 is as follows: 2020 2019 Fiscal year 2017 grant $ (6) $ 18 Fiscal year 2019 grant — 128 Total compensation expense $ (6) $ 146 At September 30, 2020, compensation costs related to these unvested stock options not yet recognized in the statements of operations was $2,945 which will be fully amortized by 2022. Restricted stock awards In fiscal year 2019, the Company granted restricted share awards to its Chairman of the Board of Directors totaling 55,147 shares, which were valued at market value on the date of grant. The shares will vest 20% per year with the first installment vesting on the first anniversary of the grant date. The fair value of the shares upon issuance totaled $0.1 million. In fiscal year 2020, the Company granted a total of 298,974 shares to its board members, which were valued at market value on the date of grant. The shares ranged in vesting periods from immediate to three years. The fair value of the shares upon issuance totaled $0.6 million. In fiscal year 2020, the Company granted a total of 220,937 shares to certain members of management, which were valued at market value on the date of grant. The shares ranged in vesting periods from immediate to three years. The fair value of the shares upon issuance totaled $0.6 million. A summary of the Company's non-vested restricted share awards (RSA) at September 30, 2020 and changes during the year ended September 30, 2020 is presented in the following table: Shares Fair Value Non-vested at September 30, 2019 44,118 $ 60 Granted 764,184 1,569 Vested (333,278) (571) Forfeited — — Non-vested at September 30, 2020 475,024 $ 1,058 In addition, certain outstanding stock options held by two members of management and one director were converted to stock grants based on a fair value calculation of the outstanding stock options. As a result, the options outstanding, which totaled 330,000 options, were forfeited and 244,273 shares of common stock were granted based on the fair value calculation of $0.6 million. Since this was considered a modification of a stock award, the Company recognized the difference between the stock grant fair value and the immediate fair value of the stock option award, before modification which totaled $0.2 million. Compensation expense related to restricted stock recorded for the years ended September 30, 2020 and 2019 is as follows, in thousands: 2020 2019 Fiscal year 2019 grant 15 38 Fiscal year 2020 grant 565 15 Total compensation expense $ 580 $ 53 Valuation of time vesting restricted stock awards for all periods presented is equal to the quoted market price for the shares on the date of the grant. The Company amortizes the fair value of the restricted share awards, graded, over the vesting period of the awards.

Equity Distribution Agreement a

Equity Distribution Agreement and Sale of Common Stock	12 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Equity Distribution Agreement and Sale of Common Stock	Equity Distribution Agreement and Sale of Common Stock On April 24, 2020, the Company entered into an Equity Distribution Agreement (the “Sales Agreement”) with Northland Securities, Inc., as agent (“Northland”), pursuant to which the Company may offer and sell, from time to time, through Northland, shares of the Company’s common stock, par value $0.01 per share, having an aggregate offering price of up to $13.9 million. The offer and sale of the Shares will be made pursuant to a shelf registration statement on Form S-3 and the related prospectus filed by the Company with the SEC on March 3, 2020, as amended on March 23, 2020, and declared effective by the SEC on April 1, 2020. Pursuant to the Sales Agreement, Northland may sell the Shares by any method permitted by law deemed to be an “at the market offering” as defined in Rule 415 of the Securities Act of 1933 (the “Securities Act”), including sales made by means of ordinary brokers’ transactions, including on The Nasdaq Global Market, at market prices or as otherwise agreed with Northland. Northland will use commercially reasonable efforts consistent with its normal trading and sales practices to sell the Shares from time to time, based upon instructions from the Company, including any price or size limits or other customary parameters or conditions the Company may impose. The sales agreement may be terminated without prior notice at any time prior to the fulfillment of the Sales Agreement if additional sales are deemed not warranted. The Company will pay Northland a commission rate equal to an aggregate of 3.0% of the aggregate gross proceeds from each sale of Shares and have agreed to provide Northland with customary indemnification and contribution rights. The Company will also reimburse Northland for certain specified expenses in connection with entering into the Sales Agreement. The Sales Agreement contains customary representations and warranties and conditions to the placements of the Shares pursuant thereto.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information (in thousands) Years ended September 30, 2020 2019 Supplemental cash flow information: Cash paid for interest $ 230 $ 126 Cash received from income taxes $ — $ (172) Supplemental noncash investing activities: Assets acquired under financing leases $ 1,352 $ — Promissory note from disposition of business $ — $ 6,375

Earnings per Share

Earnings per Share	12 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share Basic and diluted earnings per share for the years ended September 30, 2020 and 2019, in thousands: 2020 2019 Loss from continuing operations $ (17,333) $ (4,035) Discontinued operations, net of tax — (1,267) Net loss attributable to common shareholders $ (17,333) $ (5,302) Basic weighted average shares 11,164 10,361 Diluted weighted average shares 11,164 10,361 Loss per common share: Basic Continuing operations $ (1.55) $ (0.39) Discontinued operations — (0.12) Net loss $ (1.55) $ (0.51) Continuing operations $ (1.55) $ (0.39) Discontinued operations — (0.12) Net loss $ (1.55) $ (0.51) The table below includes information related to stock options that were outstanding at the end of each respective year but have been excluded from the computation of weighted-average stock options for dilutive securities due to the option exercise price exceeding the average market price per share of the Company’s common stock for the fiscal year as their effect would be anti-dilutive, or the exercise of the option is antidilutive. 2020 2019 Stock options excluded 100,000 770,000 Weighted average exercise price of stock options $ 1.55 $ 1.73 Average market price of common stock $ 2.44 $ 1.49

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The benefit for income taxes for the years ended September 30, 2020 and 2019 consists of, in thousands: 2020 2019 Continuing operations: Current $ (1,249) $ (13) Deferred — — (1,249) (13) Discontinued operations – current — 8 Total benefit for income taxes $ (1,249) $ (5) The following table summarizes the differences between the U.S. federal statutory rate and the Company’s effective tax rate for continuing operations financial statement purposes for the years ended September 30, 2020 and 2019: 2020 2019 Statutory tax rate 21.0 % 21.0 % State income taxes, net of U.S. federal tax benefit 4.8 % 6.6 % Return to accrual adjustment — % (0.6 %) Tax credits — % — % Charges without tax benefit 0.1 % (5.3 %) Valuation allowance (19.4 %) (22.1 %) Other exclusions 0.1 % 0.7 % Company’s effective tax rate 6.6 % 0.3 % The charges without tax benefit rate includes, among other things, the impact of officer life insurance, nondeductible meals and entertainment and permanent basis differences in goodwill. As a result of the CARES Act, the Company can carryback net operating losses (NOL) generated in 2018 through 2020 for a period of five years. As a result, the Company’s effective tax rate included an income tax benefit recognized during the fiscal year ended September 30, 2020 related to tax losses generated during the fiscal year up to the amount that the Company estimates is realizable based upon taxable income in the carryback periods. Therefore, as of September 30, 2020, the Company recorded a $1.2 million income tax receivable and a corresponding current benefit for income taxes. The Company continues to provide a valuation allowance of $6.4 million for all net deferred tax assets where the Company believes it is more likely than not that those deferred taxes will not be realized. The tax effects of temporary differences related to deferred taxes at September 30, 2020 and 2019 consist of the following, in thousands: 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 4,659 $ 2,632 Accounts receivable 69 41 Inventory 883 393 Intangibles 1,259 707 Accrued expenses 132 53 Stock options 14 109 Investment in equity method investee 100 112 Other — — Total deferred tax assets 7,116 4,047 Deferred tax liabilities: Financial basis in excess of tax basis of certain assets 416 705 Other 323 95 Total deferred tax liabilities 739 800 Less valuation allowance 6,377 3,247 Net deferred taxes $ — $ — The Company’s U.S. Federal net operating loss (“NOL”) carryforwards consist of the following, in thousands: NOL carryforward Year Expires Year ended September 30, 2020 $ 10,100,000 No expiry Year ended September 30, 2019 $ 2,569,000 No expiry Year ended September 30, 2018 $ 2,431,000 No expiry Year ended September 30, 2016 $ 82,820 2036 The Company records net deferred tax assets to the extent the Company believes these assets will more likely than not be realized. In making such determination, the Company considers all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies and recent financial performance. The Company has concluded, based on its recent cumulative losses, that it is more likely than not that the Company will not be able to realize the full effect of the deferred tax assets and a valuation allowance of $6.4 million is needed. Based upon a review of its income tax positions, the Company believes that its positions would be sustained upon an examination by the Internal Revenue Service and does not anticipate any adjustments that would result in a material change to its financial position. Therefore, no reserves for uncertain income tax positions have been recorded. Generally, the Company is no longer subject to examinations by the U.S. federal, state or local tax authorities for tax years before 2017.

Segment Reporting

Segment Reporting	12 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company is reporting its financial performance based on its external reporting segments: Wireless Infrastructure Services and Telecommunications. These reportable segments are described below. Wireless Infrastructure Services (“Wireless”) O n January 4, 2019, the Company purchased substantially all of the net assets of Fulton, which comprises the Wireless segment. Fulton provides turn-key wireless infrastructure services for the four major U.S. wireless carriers, communication tower companies, national integrators, and original equipment manufacturers that support these wireless carriers. These services primarily consist of the installation and upgrade of technology on cell sites and the construction of new small cells for 5G. Telecommunications (“Telco”) The Company’s Telco segment sells new and refurbished telecommunications networking equipment, including both central office and customer premise equipment, to its customer base of telecommunications providers, enterprise customers and resellers located primarily in North America. This segment also offers its customers repair and testing services for telecommunications networking equipment. In addition, this segment offers its customers decommissioning services for surplus and obsolete equipment, which it in turn processes through its recycling program. The Company evaluates performance and allocates its resources based on operating income. The accounting policies of its reportable segments are the same as those described in the summary of significant accounting policies. Segment assets consist primarily of cash and cash equivalents, accounts receivable, inventory, property and equipment, goodwill and intangible assets. (in thousands) Twelve months ended September 30, 2020 2019 Sales Wireless $ 21,354 $ 22,969 Telco 28,853 32,204 Intersegment (25) (55) Total sales $ 50,182 $ 55,118 Gross profit Wireless $ 6,580 $ 6,362 Telco 5,100 7,096 Total gross profit $ 11,680 $ 13,458 Operating loss Wireless $ (2,842) $ (882) Telco (11,341) 134 Corporate (4,347) $ (3,228) Total operating loss $ (18,530) $ (3,976) Segment assets Wireless $ 5,324 $ 5,516 Telco 12,478 22,619 Non-allocated 14,880 8,693 Total assets $ 32,683 $ 36,828

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Sep. 30, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The following is a summary of the quarterly results of operations for the years ended September 30, 2020 and 2019: (in thousands) First Second Third Fourth Fiscal year ended 2020 Sales $ 13,962 $ 11,959 $ 12,022 $ 12,239 Gross profit 3,592 (439) 4,171 4,356 Loss from continuing operations (1,718) (14,661) 23 (978) Basic and diluted loss from continuing operations per common share $ (0.17) $ (1.41) $ — $ (0.09) Fiscal year ended 2019 Sales $ 6,810 $ 12,890 $ 17,559 $ 17,859 Gross profit 1,723 3,477 4,587 3,671 Loss from continuing operations (1,203) (1,211) (58) (1,562) Basic and diluted loss from continuing operations per common share $ (0.12) $ (0.12) $ — $ (0.15) The sum of individual quarterly net loss per share may not agree to the total for the year due to each period's computation being based on the weighted average number of common shares outstanding during such period.

Subsequent events

Subsequent events	12 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent events	Subsequent events During the period December 8, 2020 through December 15, 2020, the Company sold 209,371 shares of stock under our ATM for an average price of $3.82 pursuant to our agreement with Northland Securities, Inc. as described in Note 12 – Equity Distribution Agreement and Sale of Common Stock. On December 16, 2020, the Company renewed its revolving bank line of credit for one year to a maturity date of December 17, 2021. As part of this renewal, the revolving bank line of credit remained $4.0 million, or the sum of 80% of eligible accounts receivable and 60% of eligible inventory, as defined in the loan agreement. Quarterly interest payments are based on WSJP, floating, with the addition of a 4% floor rate and a fixed charge coverage ratio of 1.25 to be tested quarterly beginning June 30, 2021.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Organization and basis of presentation	Organization and basis of presentation The consolidated financial statements include the accounts of ADDvantage Technologies Group, Inc. and its subsidiaries, all of which are wholly owned (collectively, the “Company”). Intercompany balances and transactions have been eliminated in consolidation. The Company’s reportable segments are Wireless Infrastructure Services (“Wireless”) and Telecommunications (“Telco”). The Cable Television (“Cable TV”) segment was sold on June 30, 2019, so the Company has classified the Cable TV segment as discontinued operations (see Note 4 – Discontinued Operations) in 2019. Other reclassifications The Company changed its presentation of cost of sales and operating, selling, general and administrative expenses on the unaudited consolidated condensed statements of operations. During fiscal year 2020, the Company reviewed its financial reporting of expenses in connection with its current operating segments in order to enhance the usefulness of the presentation of the Company’s expenses. Based on that review, the Company reclassified certain expenses into operating expenses for presentation purposes. Operating expenses include the indirect costs associated with operating our businesses. Indirect costs are costs that are not directly attributable to projects or products, which would include indirect personnel costs, facility costs, vehicles, insurance, communication, and business taxes, among other less significant cost categories. These costs were previously recorded in either costs of sales or operating, selling, general and administrative expenses in prior years. Additionally, the Company reclassified depreciation and amortization from operating, selling, general and administrative expenses into its own financial statement line item in the consolidated statements of operations. Selling, general and administrative expenses include overhead costs, which primarily consist of personnel costs, insurance, professional services, and communication, among other less significant cost categories. The prior year has been reclassified to conform with the current year’s presentation of costs of sales, operating expenses, selling, general and administrative expenses, and depreciation and amortization. These reclassifications had no effect on previously reported results of operations or retained earnings.
Cash, cash equivalents and restricted cash	Cash, cash equivalents and restricted cash Cash and cash equivalents include demand and time deposits, money market funds and other marketable securities with maturities of three months or less when acquired. Restricted cash consists of cash held by a third-party financial institution as a reserve in connection with an agreement to sell certain receivables with recourse in the Wireless segment, see Note 5 - Accounts Receivable Agreements. Revenue recognition The Company recognizes revenue at the time a good or service is transferred to a customer and the customer, obtains control of that good or receives the service performed. Most of the Company’s sales arrangements with customers are short-term in nature involving single performance obligations related to the delivery of goods or repair of equipment and generally provide for transfer of control at the time of shipment to the customer. The Company generally permits returns of product or repaired equipment due to defects, historically, returns have not been significant. Additionally, the Company provides services related to the installation and upgrade of technology on cell sites and the construction of new small cells for 5G technology. The work under the purchase orders for wireless infrastructure services are generally completed in less than a month. These services generally consist of a single performance obligation which the Company recognizes as revenue over time. The Company’s principal sales are from Wireless services, sales of Telco equipment and Telco recycled equipment. The Company’s customers include wireless carriers, wireless equipment providers, multiple system operators, resellers and direct sales to end-user customers. The timing of revenue recognition from the wireless segment results in contract assets and contract liabilities. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, the Company sometimes receives advances or deposits from customers before revenue is recognized, resulting in contract
Accounts receivable	Accounts receivable Trade receivables are carried at original invoice amount less an estimate made for doubtful accounts. Management determines the allowance for doubtful accounts by regularly evaluating individual customer receivables and considering a customer’s financial condition, credit history and current economic conditions. Trade receivables are written off against the allowance when deemed uncollectible. Recoveries of trade receivables previously written off are recorded when received. The Company generally does not charge interest on past due accounts.
Inventories	Inventories For the Telco segment, inventories consist of new, refurbished and used telecommunications equipment. Inventory is stated at the lower of cost or net realizable value. Cost is determined using the weighted-average method. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. For the Telco segment, the Company records an inventory reserve provision to reflect inventory at its estimated net realizable value based on a review of inventory quantities on hand, historical sales volumes and technology changes. These reserves are to provide for items that are potentially slow-moving, excess or obsolete.
Leases	Leases The Company determines if an arrangement is a lease at inception of the arrangement. To the extent that we determine an arrangement represents a lease, we classify that lease as either a right-of-use ("ROU") lease or a finance lease. We capitalize ROU leases on our consolidated balance sheets through a right-of-use asset and a corresponding right-of-use lease liability. ROU assets represent our right to use an underlying asset for the lease term and ROU lease liabilities represent our obligation to make lease payments arising from the lease. ROU leases are included in long-term assets and ROU lease liabilities are classified as either current or long-term liabilities in our consolidated balance sheets. ROU assets and liabilities are recognized at the commencement date of an arrangement based on the present value of lease payments over the lease term. Lease expense for ROU lease payments is recognized on a straight-line basis over the lease term. ADDvantage adopted this standard on October 1, 2019.
Property and equipment	Property and equipment Property and equipment consist of software, office equipment, wireless services equipment and warehouse and service equipment with estimated useful lives generally of 3 years, 5 years, 7 years, and 10 years, respectively. The wireless services equipment includes mobile wireless temporary towers, equipment trailers and construction equipment. Depreciation is provided using the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the useful lives or the remainder of the lease agreement. Gains or losses from the ordinary sale or retirement of property and equipment are recorded are included in operating expense. Repairs and maintenance costs are generally expensed as incurred, whereas major improvements are capitalized. Depreciation expense was $0.9 million and $0.4 million for the years ended September 30, 2020 and 2019, respectively.
Goodwill	Goodwill Goodwill represents the excess of purchase price of acquisitions over the acquisition date fair value of the net assets of businesses acquired. Goodwill is not amortized and is tested at least annually for impairment. The Company performs its annual analysis during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional analysis. Goodwill is evaluated for impairment by comparing the estimate of the fair value of each reporting unit, or operating segment, with the reporting unit’s carrying value, including goodwill. The reporting units for purposes of the goodwill impairment calculation are aggregated into the Wireless segment and ADDvantage Triton LLC (Triton) operating segment, and Nave Communications Company (Nave) operating segment. Management utilizes a discounted cash flow analysis to determine the estimated fair value of each reporting unit. Significant judgments and assumptions including the discount rate, anticipated revenue growth rate, gross margins and operating expenses are inherent in these fair value estimates. As a result, actual results may differ from the estimates utilized in the discounted cash flow analysis. The use of alternate judgments and/or assumptions could result in the recognition of different levels of impairment charges in the financial statements. During the year ended September 30, 2020, due to operating losses and uncertainties surrounding the impact of the COVID-19 pandemic on the overall economy and the resulting impact on the capital budgets of both Customers and our Company, we determined that impairment indicators were present. The Company performed a valuation using a discounted cash flow analysis for the Nave and Triton operating segments to determine if the fair value exceeded their respective carrying values. For both Nave and Triton, the fair value for each was less than their respective carrying values. Therefore, the Company recorded an impairment charges of $4.8 million as of March 31, 2020, which fully impaired goodwill for both operating segments in the Telco segment. Although the Company does not anticipate a future impairment charge, certain events could occur that might adversely affect the reported value of the remaining goodwill in the Wireless segment, which was $0.1 million at September 30, 2020.
Intangible assets	Intangible assetsIntangible assets consist of customer relationships, trade names, and intellectual property. Intangibles assets that have finite useful lives are amortized on a straight-line basis over their estimated useful lives ranging from 3 years to 10 years.
Impairment of long-lived assets	Impairment of long-lived assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the asset’s carrying amount may not be recoverable. The Company conducts its long-lived asset impairment analyses in accordance with ASC 360-10-15, “Impairment or Disposal of Long-Lived Assets.” ASC 360-10-15 requires the Company to group assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities and evaluate the asset group against the sum of the undiscounted future cash flows. If the undiscounted cash flows do not indicate the carrying amount of the asset is recoverable, an impairment charge is measured as the amount by which the carrying amount of the asset group exceeds its fair value based on discounted cash flow analysis or appraisals.
Income taxes	Income taxes The Company provides for income taxes in accordance with the liability method of accounting. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and tax carryforward amounts. Management provides a valuation allowance against deferred tax assets for amounts which are not considered “more likely than not” to be realized.
Advertising costs	Advertising costs Advertising costs are expensed as incurred. Advertising expense was $0.5 million and $0.6 million for the years ended September 30, 2020 and 2019, respectively.
Management estimates	Management estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Any significant, unanticipated changes in product demand, technological developments or continued economic trends affecting the wireless infrastructure or telecommunications industries could have a significant impact on the value of the Company's inventory and operating results.
Concentrations of risk	Concentrations of risk The Company holds cash with one major financial institution, which at times exceeds FDIC insured limits. Historically, the Company has not experienced any losses due to such concentration of credit risk.
Share-based compensation	Share-based compensation ADDvantage has historically compensated our directors and executives using time-based stock options and restricted shares awards (RSA's). ADDvantage accounts for share-based payment awards under ASC 718 - Compensation - Stock Compensation (ASC 718) , which requires that the value of the awards is established at the date of the grant and is expensed over the vesting period of the grant. The method of determining the fair value of share-based payments depends on the type of award. Share-based awards that vest over a certain service period with no market conditions are valued at the closing market price on the grant date. Option grants are valued using the Black-Scholes-Merton model using model inputs that are determined on the date of the grant. Once the per-share fair value on the grant date is established, the aggregate expense of the grant is recognized on a graded vesting basis over the vesting period of the grant.
Fair value of financial instruments	Fair value of financial instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities approximate fair value due to their short maturities. The carrying value of the Company’s variable-rate line of credit approximates its fair value since the interest rate fluctuates periodically based on a floating interest rate. Retirement Plan The Company sponsors a 401(k) plan that allows participation by all employees who are at least 21 years of age and have completed one year of service. The Company's contributions to the plan consist of a matching contribution as determined by the plan document. Costs recognized under the 401(k) plan were $0.1 million and, $0.3 million for the years ended September 30, 2020 and September 30, 2019, respectively, after temporarily suspending matching contributions during 2020.
Recently issued accounting standards	ecently issued accounting standardsIn June 2016, the FASB issued ASU 2016-13: “Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments.” This ASU requires entities to measure all expected credit losses for most financial assets held at the reporting date based on an expected loss model which includes historical experience, current conditions, and reasonable and supportable forecasts. Entities will now use forward-looking information to better form their credit loss estimates. This ASU also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity’s portfolio. ASU 2016-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal periods. ADDvantage expects to adopt the standard in the first quarter of fiscal year 2021. Management's initial evaluation is that due to the nature of our customer base, the adoption of this standard will not have a significant impact on our trade accounts receivable and contract assets.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Sales by type were as follows, in thousands: Years Ended September 30, 2020 2019 Wireless services sales $ 21,354 $ 22,919 Equipment sales: Telco 27,109 29,391 Inter-segment (25) (55) Telco repair sales 68 43 Telco recycle sales 1,676 2,820 Total sales $ 50,182 $ 55,118

2019 Acquisition (Tables)

2019 Acquisition (Tables)	12 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following summarizes the final purchase price allocation of the fair value of the assets acquired and the liabilities assumed at January 4, 2019, in thousands: Assets acquired: Accounts receivable $ 828 Unbilled revenue 438 Prepaid expenses 341 Property and equipment 1,201 Intangible assets 244 Other assets 35 Goodwill 57 Total assets acquired 3,144 Liabilities assumed: Accounts payable 1,250 Accrued expenses 455 Capital lease obligation 175 Total liabilities assumed 1,880 Net purchase price $ 1,264
Business Acquisition, Pro Forma Information	(Unaudited) Year Ended (in thousands) September 30, 2019 Total net sales $ 58,955 Loss from continuing operations $ (4,461) Net loss $ (5,728)

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The calculation of the pretax loss of the Cable transaction was as follows, in thousands: Contract price $ 10,314 Less: Real estate sales 2,075 Less: Working capital adjustment 1,111 Net purchase price 7,128 Assets sold: Accounts receivable 2,038 Inventories 10,259 Prepaids and other assets 73 Property and equipment, net 336 12,706 Liabilities transferred: Accounts payable 1,306 Accrued expenses 467 1,773 Net assets sold 10,933 Pretax loss on sale of net assets of Cable TV segment $ (3,805) The total pretax gain related to the sale of all real estate facilities, including the Cable transaction and the Broken Arrow facility, is as follows, in thousands: Aggregate purchase price $ 7,075 Less: Book value of real estate facilities 4,763 Pretax gain $ 2,312 As a result of the Cable transaction and the three real estate facility sales to David Chymiak, the Company received total proceeds of $14.2 million and recorded a pretax loss on the sales of $1.5 million for the year ended September 30, 2019 as follows, in thousands: Proceeds: Cash received from real estate facility sales $ 7,075 Cash received from sale of Cable TV segment 753 Promissory note from sale of Cable TV segment 6,375 Total proceeds 14,203 Book value of assets sold: Cable TV segment 10,932 Real estate facilities 4,763 Total book value of assets sold 15,695 Pretax loss on sale of discontinued operations $ (1,492) The Company did not have income related to the discontinued operations during the year ended September 30, 2020. Loss from discontinued operations, net of tax and the loss on sale of discontinued operations, net of tax, of the Cable TV segment business which are presented in total as loss from discontinued operations, net of tax in the Company’s consolidated statements of operations for the year ended September 30, 2019 is as follows, in thousands: September 30, 2019 Total net sales $ 13,743 Cost of sales 10,097 Operating, selling, general and administrative expenses 3,412 Other expenses 2 Income from discontinued operations 232 Loss on sale of discontinued operations (1,491) Income tax provision 8 Loss from discontinued operations, net of tax $ (1,267)
Schedule of Financing Receivables, Minimum Payments	The remaining promissory note, which is collateral under the Company's note payable with its primary lender, is scheduled to be received by the Company in semi-annual installments over five years including interest of 6% as follows, in thousands: Fiscal year 2021 $ 1,400 Fiscal year 2022 940 Fiscal year 2023 940 Fiscal year 2024 495 Total proceeds $ 3,775

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories, which are all within the Telco segment, at September 30, 2020 and September 30, 2019 are as follows, in thousands: 2020 2019 New equipment $ 1,311 $ 1,496 Refurbished and used equipment 7,499 7,405 Allowance for excess and obsolete inventory: (3,054) (1,275) Total inventories, net $ 5,756 $ 7,626

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill	The intangible assets with their associated accumulated amortization amounts at September 30, 2020 and September 30, 2019 are as follows, in thousands: September 30, 2020 Gross Accumulated Impairment Net Intangible assets: Customer relationships – 10 years $ 8,396 $ (4,021) $ (3,894) $ 481 Trade name – 10 years 2,122 (1,178) — 944 Non-compete agreements – 3 years 374 (374) — — Total intangible assets $ 10,892 $ (5,573) $ (3,894) $ 1,425 September 30, 2019 Gross Accumulated Impairment Net Intangible assets: Customer relationships – 10 years $ 8,396 $ (3,548) $ — $ 4,848 Trade name – 10 years 2,119 (966) — 1,153 Non-compete agreements – 3 years 374 (372) — 2 Total intangible assets $ 10,889 $ (4,886) $ — $ 6,003
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated aggregate amortization expense for each of the next five fiscal years is as follows, in thousands: 2021 $ 319 2022 319 2023 319 2024 195 2025 107 Thereafter 166 Total $ 1,425

Accrued Expenses (Tables)

Accrued Expenses (Tables)	12 Months Ended
	Sep. 30, 2020
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities	2020 2019 Employee costs $ 942 $ 1,192 Taxes other than income tax 91 69 Interest 23 — Other, net 443 357 Total accrued expenses $ 1,499 $ 1,618

Debt (Tables)

Debt (Tables)	12 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Maturities of Long-term Debt	As of September 30, 2020, the aggregate maturities of debt for the next five years and thereafter are as follows (in thousands): 2021 $ 4,509 2022 2,440 Thereafter — Total $ 6,949

Leases (Tables)

Leases (Tables)	12 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lease, Cost	The components of lease expense were as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Right-of-use lease cost Impairment of right-of-use asset $ 660 Right-of-use lease cost 1,586 Total right-of-use lease cost $ 2,246 Finance lease costs Amortization assets under finance leases $ 335 Interest on finance lease liabilities 59 Total finance lease cost $ 394
Schedule of Cash Flow, Supplemental Disclosures	Supplemental cash flow information related to leases are as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from right-of-use leases $ 1,586 Operating cash flows from finance leases $ 59 Financing cash flows from finance leases $ 387 (in thousands) Years ended September 30, 2020 2019 Supplemental cash flow information: Cash paid for interest $ 230 $ 126 Cash received from income taxes $ — $ (172) Supplemental noncash investing activities: Assets acquired under financing leases $ 1,352 $ — Promissory note from disposition of business $ — $ 6,375
Assets And Liabilities, Lessee	Supplemental balance sheet information related to leases are as follows, in thousands: September 30, 2020 Right-of-use leases Right-of-use lease assets $ 3,758 Right-of-use lease obligations - current $ 1,275 Right-of-use lease obligations 3,310 Total right-of-use lease liabilities $ 4,585 Finance leases Property and equipment, gross $ 1,463 Accumulated depreciation (393) Property and equipment, net $ 1,070 Financing lease obligations - current $ 285 Financing lease obligations 791 Total finance lease liabilities $ 1,076 Weighted Average Remaining Lease Term Right-of-use leases 3.75 years Finance leases 3.88 years Weighted Average Discount Rate Right-of-use leases 5.00% Finance leases 4.96%
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities are as follows for the year ending September 30, 2020, in thousands: Right-of-Use Leases Finance Leases 2021 $ 1,441 $ 325 2022 1,341 292 2023 1,328 278 2024 802 234 2025 150 44 Total lease payments 5,062 1,173 Less imputed interest 477 98 Total lease obligations $ 4,585 $ 1,075
Finance Lease, Liability, Fiscal Year Maturity	Maturities of lease liabilities are as follows for the year ending September 30, 2020, in thousands: Right-of-Use Leases Finance Leases 2021 $ 1,441 $ 325 2022 1,341 292 2023 1,328 278 2024 802 234 2025 150 44 Total lease payments 5,062 1,173 Less imputed interest 477 98 Total lease obligations $ 4,585 $ 1,075

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Option, Activity	A summary of the status of the Company's stock options at September 30, 2020 and changes during the year then ended is presented below in thousands, except share and per share amounts: Options (Shares) Weighted Average Aggregate Outstanding at September 30, 2019 770,000 $ 1.73 $ 353 Granted — — — Exercised (123,334) 1.67 304 Expired — — — Forfeited (546,666) — 606 Outstanding at September 30, 2020 100,000 $ 1.55 $ 38 Exercisable at September 30, 2020 66,667 $ 1.68 $ 16 The intrinsic value of exercised options for the years ended September 30, 2020 and 2019, in thousands: 2020 2019 Value at exercise date $ 510 $ — Exercise price 206 — Intrinsic value $ 304 $ —
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable	Information about the Company’s outstanding and exercisable stock options at September 30, 2020 is as follows, in thousands except share and per share amounts: Exercise Price Stock Options Exercisable Remaining Contractual Life Aggregate $ 1.28 50,000 16,667 8.25 $ 32 $ 1.81 50,000 50,000 6.42 6 100,000 66,667 $ 38
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The estimated fair value at date of grant for stock options utilizing the Black-Scholes option valuation model and the assumptions that were used in the Black-Scholes option valuation model for the fiscal year 2019 stock option grants are as follows: Estimated fair value of options at grant date $196,970 Black-Scholes model assumptions: Average expected life (years) 6 Average expected volatile factor 29% Average risk-free interest rate 2.8% Average expected dividend yield —
Share-based Payment Arrangement, Expensed and Capitalized, Amount	The Company realized a net benefit related to the recognition of forfeitures of stock options during the year ended September 30, 2020. Compensation expense related to stock options recorded for the years ended September 30, 2020 and 2019 is as follows: 2020 2019 Fiscal year 2017 grant $ (6) $ 18 Fiscal year 2019 grant — 128 Total compensation expense $ (6) $ 146 Compensation expense related to restricted stock recorded for the years ended September 30, 2020 and 2019 is as follows, in thousands: 2020 2019 Fiscal year 2019 grant 15 38 Fiscal year 2020 grant 565 15 Total compensation expense $ 580 $ 53
Schedule of Non-vested Restricted Share Awards	A summary of the Company's non-vested restricted share awards (RSA) at September 30, 2020 and changes during the year ended September 30, 2020 is presented in the following table: Shares Fair Value Non-vested at September 30, 2019 44,118 $ 60 Granted 764,184 1,569 Vested (333,278) (571) Forfeited — — Non-vested at September 30, 2020 475,024 $ 1,058

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	Supplemental cash flow information related to leases are as follows for the year ended September 30, 2020, in thousands: September 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from right-of-use leases $ 1,586 Operating cash flows from finance leases $ 59 Financing cash flows from finance leases $ 387 (in thousands) Years ended September 30, 2020 2019 Supplemental cash flow information: Cash paid for interest $ 230 $ 126 Cash received from income taxes $ — $ (172) Supplemental noncash investing activities: Assets acquired under financing leases $ 1,352 $ — Promissory note from disposition of business $ — $ 6,375

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Basic and diluted earnings per share for the years ended September 30, 2020 and 2019, in thousands: 2020 2019 Loss from continuing operations $ (17,333) $ (4,035) Discontinued operations, net of tax — (1,267) Net loss attributable to common shareholders $ (17,333) $ (5,302) Basic weighted average shares 11,164 10,361 Diluted weighted average shares 11,164 10,361 Loss per common share: Basic Continuing operations $ (1.55) $ (0.39) Discontinued operations — (0.12) Net loss $ (1.55) $ (0.51) Continuing operations $ (1.55) $ (0.39) Discontinued operations — (0.12) Net loss $ (1.55) $ (0.51)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The table below includes information related to stock options that were outstanding at the end of each respective year but have been excluded from the computation of weighted-average stock options for dilutive securities due to the option exercise price exceeding the average market price per share of the Company’s common stock for the fiscal year as their effect would be anti-dilutive, or the exercise of the option is antidilutive. 2020 2019 Stock options excluded 100,000 770,000 Weighted average exercise price of stock options $ 1.55 $ 1.73 Average market price of common stock $ 2.44 $ 1.49

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The benefit for income taxes for the years ended September 30, 2020 and 2019 consists of, in thousands: 2020 2019 Continuing operations: Current $ (1,249) $ (13) Deferred — — (1,249) (13) Discontinued operations – current — 8 Total benefit for income taxes $ (1,249) $ (5)
Schedule of Effective Income Tax Rate Reconciliation	The following table summarizes the differences between the U.S. federal statutory rate and the Company’s effective tax rate for continuing operations financial statement purposes for the years ended September 30, 2020 and 2019: 2020 2019 Statutory tax rate 21.0 % 21.0 % State income taxes, net of U.S. federal tax benefit 4.8 % 6.6 % Return to accrual adjustment — % (0.6 %) Tax credits — % — % Charges without tax benefit 0.1 % (5.3 %) Valuation allowance (19.4 %) (22.1 %) Other exclusions 0.1 % 0.7 % Company’s effective tax rate 6.6 % 0.3 %
Schedule of Deferred Tax Assets and Liabilities	The tax effects of temporary differences related to deferred taxes at September 30, 2020 and 2019 consist of the following, in thousands: 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 4,659 $ 2,632 Accounts receivable 69 41 Inventory 883 393 Intangibles 1,259 707 Accrued expenses 132 53 Stock options 14 109 Investment in equity method investee 100 112 Other — — Total deferred tax assets 7,116 4,047 Deferred tax liabilities: Financial basis in excess of tax basis of certain assets 416 705 Other 323 95 Total deferred tax liabilities 739 800 Less valuation allowance 6,377 3,247 Net deferred taxes $ — $ —
Summary of Operating Loss Carryforwards	The Company’s U.S. Federal net operating loss (“NOL”) carryforwards consist of the following, in thousands: NOL carryforward Year Expires Year ended September 30, 2020 $ 10,100,000 No expiry Year ended September 30, 2019 $ 2,569,000 No expiry Year ended September 30, 2018 $ 2,431,000 No expiry Year ended September 30, 2016 $ 82,820 2036

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	(in thousands) Twelve months ended September 30, 2020 2019 Sales Wireless $ 21,354 $ 22,969 Telco 28,853 32,204 Intersegment (25) (55) Total sales $ 50,182 $ 55,118 Gross profit Wireless $ 6,580 $ 6,362 Telco 5,100 7,096 Total gross profit $ 11,680 $ 13,458 Operating loss Wireless $ (2,842) $ (882) Telco (11,341) 134 Corporate (4,347) $ (3,228) Total operating loss $ (18,530) $ (3,976) Segment assets Wireless $ 5,324 $ 5,516 Telco 12,478 22,619 Non-allocated 14,880 8,693 Total assets $ 32,683 $ 36,828

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	The following is a summary of the quarterly results of operations for the years ended September 30, 2020 and 2019: (in thousands) First Second Third Fourth Fiscal year ended 2020 Sales $ 13,962 $ 11,959 $ 12,022 $ 12,239 Gross profit 3,592 (439) 4,171 4,356 Loss from continuing operations (1,718) (14,661) 23 (978) Basic and diluted loss from continuing operations per common share $ (0.17) $ (1.41) $ — $ (0.09) Fiscal year ended 2019 Sales $ 6,810 $ 12,890 $ 17,559 $ 17,859 Gross profit 1,723 3,477 4,587 3,671 Loss from continuing operations (1,203) (1,211) (58) (1,562) Basic and diluted loss from continuing operations per common share $ (0.12) $ (0.12) $ — $ (0.15)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional information (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Line Items]
Depreciation										$ 868	$ 368
Goodwill impairment									$ 4,800
Goodwill, purchase accounting adjustments										100
Advertising expense										$ 500	$ 600
Revenues	$ 12,239	$ 12,022	$ 11,959	$ 13,962	$ 17,859	$ 17,559	$ 12,890	$ 6,810
Minimum
Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life										3 years
Maximum
Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life										10 years
Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life										3 years
Office Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life										5 years
Warehouse and Service Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life										7 years
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life										10 years

Revenue Recognition- Additional

Revenue Recognition- Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 50,182	$ 55,118
Unbilled revenue	590	2,691
Deferred revenue	$ 113	97
Revenue Benchmark | Customer Concentration Risk | Largest Customer
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	14.00%
International Regions Excluding Central America and South America
Disaggregation of Revenue [Line Items]
Sales	$ 1,900	2,400
Contract with customer, asset, after allowance for credit loss		2,700
Contract with customer, liability		$ 100

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Sales	$ 50,182	$ 55,118
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Sales	(25)	(55)
Telco | Operating Segments
Disaggregation of Revenue [Line Items]
Sales		32,204
Wireless Services
Disaggregation of Revenue [Line Items]
Sales	21,354	22,919
Equipment Sales | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Sales	(25)	(55)
Equipment Sales | Telco | Operating Segments
Disaggregation of Revenue [Line Items]
Sales	27,109	29,391
Telco Repair
Disaggregation of Revenue [Line Items]
Sales	68	43
Telco Recycle
Disaggregation of Revenue [Line Items]
Sales	$ 1,676	$ 2,820

2019 Acquisition - Additional I

2019 Acquisition - Additional Information (Details) $ in Millions	Jan. 04, 2019USD ($)carrier	Dec. 27, 2018carrier
Business Acquisition [Line Items]
Number of U.S. wireless carriers | carrier	4	4
Fulton and Mill City
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 1.3
Fulton and Mill City | Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 0.2

2019 Acquisition - Schedule of

2019 Acquisition - Schedule of Business Acquisitions, by Acquisition (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Jan. 04, 2019
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill	$ 58	$ 4,878
Fulton and Mill City
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Accounts receivable			$ 828
Unbilled revenue			438
Prepaid expenses			341
Property and equipment			1,201
Intangible assets			244
Other assets			35
Goodwill			57
Total assets acquired			3,144
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable			1,250
Accrued expenses			455
Capital lease obligation			175
Total liabilities assumed			1,880
Net purchase price			$ 1,264

2019 Acquisition - Business Acq

2019 Acquisition - Business Acquisition, Pro Forma Information (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2019USD ($)
Business Combinations [Abstract]
Total net sales	$ 58,955
Loss from continuing operations	(4,461)
Net loss	$ (5,728)

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Details) - Cable TV Business Segment - USD ($) $ in Millions	Jun. 30, 2019	Nov. 29, 2018	Sep. 30, 2020	Sep. 30, 2019	May 29, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration, purchase price					$ 10.3
Disposal group, including discontinued operation, consideration, cash	$ 3.9
Disposal group, including discontinued operation, consideration, estimated working capital adjustment	1.1
Disposal group, including discontinued operation, consideration, real estate sales	2.1
Disposal group, including discontinued operation, consideration, promissory note	$ 6.4
Note receivable, term	5 years
Note receivable, interest rate	6.00%
Aggregate purchase price				$ 14.2
Pretax loss on sale of discontinued operations				1.5
David Chymiak
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate purchase price		$ 5
David Chymiak | Broken Arrow, Oklahoma facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax loss on sale of discontinued operations		$ 1.4
Leveling 8
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration, estimated working capital adjustment	$ 1.1			0.7
Disposal group, including discontinued operation, consideration, promissory note				2.6
Note receivable, term			5 years
Note receivable, interest rate			6.00%
Disposal group, including discontinued operation, consideration, down payment				$ 1.8

Discontinued Operations - Preta

Discontinued Operations - Pretax Loss of the Cable Transaction (Details) - Cable TV Business Segment - USD ($) $ in Thousands	May 29, 2019	Nov. 29, 2018	Sep. 30, 2019	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract price	$ 10,300
Less: Real estate sales				$ 2,100
Less: Working capital adjustment				$ 1,100
Net purchase price			$ 14,200
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract price	10,314
Less: Real estate sales	2,075
Less: Working capital adjustment	1,111
Net purchase price	7,128	$ 7,075	14,203
Assets sold:
Accounts receivable	2,038
Inventories	10,259
Prepaids and other assets	73
Property and equipment, net	336
Assets	12,706
Liabilities transferred:
Accounts payable	1,306
Accrued expenses	467
Liabilities	1,773
Net assets sold	10,933
Pretax loss on sale of net assets of Cable TV segment	$ (3,805)	$ 2,312	$ (1,491)

Discontinued Operations - Cable

Discontinued Operations - Cable Transaction and the Broken Arrow Facility (Details) - USD ($) $ in Thousands	May 29, 2019	Nov. 29, 2018	Sep. 30, 2019	Sep. 30, 2020
Cable TV Business Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate purchase price			$ 14,200
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net assets sold				$ 15,695
Discontinued Operations, Disposed of by Sale | Cable TV Business Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate purchase price	$ 7,128	$ 7,075	14,203
Net assets sold		4,763
Pretax gain	$ (3,805)	$ 2,312	$ (1,491)

Discontinued Operations - Sale

Discontinued Operations - Sale of Cable TV Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	May 29, 2019	Nov. 29, 2018
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total book value of assets sold	$ 15,695
Cable TV Business Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from real estate facility sales			$ 3,900
Promissory note from sale of Cable TV segment			$ 6,400
Net purchase price		$ 14,200
Pretax loss on sale of discontinued operations		1,500
Cable TV Business Segment | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from real estate facility sales		7,075
Cash received from sale of Cable TV segment		753
Promissory note from sale of Cable TV segment		6,375
Net purchase price		$ 14,203		$ 7,128	$ 7,075
Total book value of assets sold					$ 4,763
Pretax loss on sale of discontinued operations	(1,492)
Cable TV segment | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total book value of assets sold	10,932
Real estate facilities | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total book value of assets sold	$ 4,763

Discontinued Operations - Promi

Discontinued Operations - Promissory Note (Details) $ in Thousands	Sep. 30, 2019USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Fiscal Year 2021	$ 1,400
Fiscal Year 2022	940
Fiscal Year 2023	940
Fiscal Year 2024	495
Total proceeds	$ 3,775

Discontinued Operations - Incom

Discontinued Operations - Income related to the Discontinued Operations (Details) - USD ($) $ in Thousands	May 29, 2019	Nov. 29, 2018	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax provision			$ 0	$ 8
Loss from discontinued operations, net of tax			$ 0	(1,267)
Discontinued Operations, Disposed of by Sale | Cable TV Business Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total net sales				13,743
Cost of sales				10,097
Operating, selling, general and administrative expenses				3,412
Other expenses				2
Income from discontinued operations				232
Loss on sale of discontinued operations	$ (3,805)	$ 2,312		(1,491)
Income tax provision				8
Loss from discontinued operations, net of tax				$ (1,267)

Accounts Receivable Agreements

Accounts Receivable Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restricted cash	$ 108	$ 352
Certain Receivables to Unrelated Third-parties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable agreement, percent of sold receivables advanced	90.00%
Accounts receivable agreement, percent of sold receivables advanced, deduction	1.60%
Accounts receivable agreement, reserve of sold receivables, percent	10.00%
Sale of receivables, maximum limit of receivables uncollected	$ 3,500
Proceeds from collection of finance receivables	18,900
Certain Receivables to Unrelated Third-parties | Other Nonoperating Income (Expense)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost of selling receivables	$ 300
Certain Receivables to Unrelated Third-parties | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, cost of sales, percent	1.00%
Certain Receivables to Unrelated Third-parties | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, cost of sales, percent	1.80%
Uncollectible Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of receivables, maximum limit of receivables uncollected	$ 600

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Inventory [Line Items]
Provision for excess and obsolete inventories	$ 1,782	$ 682
Inventory valuation reserves	3,054	1,275
Telco
Inventory [Line Items]
Provision for excess and obsolete inventories	0	0
Inventory valuation reserves	3,100
Inventory, lower of cost or market reserve	$ 1,800	$ 700

Inventories - Schedule of Inven

Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Inventory [Line Items]
Allowance for excess and obsolete inventory:	$ (3,054)	$ (1,275)
Total inventories, net	5,756	7,626
New equipment
Inventory [Line Items]
Inventory, gross	1,311	1,496
Refurbished and used equipment
Inventory [Line Items]
Inventory, gross	$ 7,499	$ 7,405

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	Jan. 04, 2019	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 0.7	$ 1.1
Customer Relationships | Telco | COVID-19 Pandemic
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets, finite-lived		$ 3.9
Customer Relationships | Fulton and Mill City
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 0.2

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 10,892	$ 10,889
Finite-lived intangible assets, accumulated amortization	(5,573)	(4,886)
Finite-lived intangible assets, impairment	(3,894)	0
Total	1,425	6,003
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	8,396	8,396
Finite-lived intangible assets, accumulated amortization	(4,021)	(3,548)
Finite-lived intangible assets, impairment	(3,894)	0
Total	481	4,848
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	2,122	2,119
Finite-lived intangible assets, accumulated amortization	(1,178)	(966)
Finite-lived intangible assets, impairment	0	0
Total	944	1,153
Noncompete Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	374	374
Finite-lived intangible assets, accumulated amortization	(374)	(372)
Finite-lived intangible assets, impairment	0	0
Total	$ 0	$ 2

Intangible Assets - Schedule _2

Intangible Assets - Schedule of Intangible Assets, Useful Life (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Customer Relationships
Finite-lived intangible asset, useful life	10 years	10 years
Trade Names
Finite-lived intangible asset, useful life	10 years	10 years
Noncompete Agreements
Finite-lived intangible asset, useful life	3 years	3 years

Intangible Assets - Estimated A

Intangible Assets - Estimated Aggregate Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2021	$ 319
2022	319
2023	319
2024	195
2025	107
Thereafter	166
Total	$ 1,425	$ 6,003

Accrued Expenses - Schedule of

Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Payables and Accruals [Abstract]
Employee costs	$ 942	$ 1,192
Taxes other than income tax	91	69
Interest	23	0
Other, net	443	357
Total accrued expenses	$ 1,499	$ 1,618

Debt - Additional Information (

Debt - Additional Information (Details)	Dec. 16, 2020USD ($)	Apr. 14, 2020USD ($)	Sep. 30, 2020USD ($)	Dec. 17, 2020	Mar. 10, 2020USD ($)installment
Paycheck Protection Program Loan
Debt Instrument [Line Items]
Interest rate		1.00%
Debt face amount		$ 2,900,000
Payment amount		$ 164,045
Line of Credit | Credit and Term Loan Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 3,500,000
Interest rate					6.00%
Debt Instrument, Number of Installments | installment					7
Line of credit facility, current borrowing capacity					$ 1,200,000
Revolving Credit Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt instrument, interest rate, effective percentage			3.25%
Line of credit facility, current borrowing capacity			$ 3,300,000
Debt instrument, covenant, interest coverage ratio, minimum			1.25
Bank line of credit			$ 2,800,000
Percentage of qualified accounts receivable used in determination of maximum borrowing capacity of line of credit			80.00%
Percentage of qualified inventory used in determination of maximum borrowing capacity of line of credit			60.00%
Line of credit facility, remaining borrowing capacity			$ 500,000
Revolving Credit Facility | New Credit Agreement | Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity	$ 4,000,000
Debt instrument, covenant, interest coverage ratio, minimum	1.25
Percentage of qualified accounts receivable used in determination of maximum borrowing capacity of line of credit	80.00%
Percentage of qualified inventory used in determination of maximum borrowing capacity of line of credit				25.00%
Floor rate	4.00%

Debt - Schedule of Maturity of

Debt - Schedule of Maturity of Debt and Finance Lease (Details) $ in Thousands	Sep. 30, 2020USD ($)
Debt Disclosure [Abstract]
2021	$ 4,509
2022	2,440
Thereafter	0
Total	$ 6,949

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Total lease obligations	$ 4,585
Total lease obligations	1,075
Right-of-use obligations, current	1,275	$ 0
Impairment of right-of-use asset	660	0
Right-of-use assets	3,758	$ 0
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Total lease obligations	1,400
Right-of-use assets	$ 4,600
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	5 years

Leases - Schedule of Lease Cost

Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Right-of-use lease cost
Impairment of right-of-use asset	$ 660	$ 0
Right-of-use lease cost	1,586
Total right-of-use lease cost	2,246
Amortization assets under finance leases	335
Interest on finance lease liabilities	59
Total finance lease cost	$ 394

Leases - Schedule of Cash Flow,

Leases - Schedule of Cash Flow, Supplemental Disclosures (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2020USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from right-of-use leases	$ 1,586
Operating cash flows from finance leases	59
Financing cash flows from finance leases	$ 387

Leases - Assets And Liabilities

Leases - Assets And Liabilities, Lessee (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Right-of-use leases
Right-of-use assets	$ 3,758	$ 0
Right-of-use obligations, current	1,275	0
Right-of-use obligations, current	3,310	0
Total lease obligations	4,585
Finance leases
Property and equipment, gross	1,463
Accumulated depreciation	(393)
Property and equipment, net	1,070
Finance lease obligations, current	285	0
Financing lease obligations	791	$ 0
Total lease obligations	$ 1,075
Weighted Average Remaining Lease Term [Abstract]
Right-of-use leases	3 years 9 months
Finance leases	3 years 10 months 17 days
Leases, Weighted Average Discount Rate [Abstract]
Right-of-use leases	500.00%
Finance leases	496.00%

Leases - Lessee, Operating Leas

Leases - Lessee, Operating Lease, Liability, Maturity (Details) $ in Thousands	Sep. 30, 2020USD ($)
Right-of-Use Leases
2021	$ 1,441
2022	1,341
2023	1,328
2024	802
2025	150
Total lease payments	5,062
Less imputed interest	477
Total lease obligations	4,585
Finance Leases
2021	325
2022	292
2023	278
2024	234
2025	44
Total	1,173
Less imputed interest	98
Total lease obligations	$ 1,075

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Details)	12 Months Ended
	Sep. 30, 2020USD ($)membershares	Sep. 30, 2019USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, granted (in shares)	0
Share-based payment arrangement, nonvested award, cost not yet recognized, amount | $	$ 2,945
Granted (in shares)	764,184
Aggregate intrinsic value, nonvested | $	$ 1,058,000	$ 60,000
Number of members of management | member	2
Nonvested options (in shares)	475,024	44,118
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average expected dividend yield		0.00%
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, granted (in shares)	480,000	0
Average expected dividend yield	0.00%
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Employees | Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period	10 years
Employees | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	5 years
Board Of Directors | Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period	10 years
Board of Directors Chairman | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	3 years
Granted (in shares)	298,974	55,147
Aggregate intrinsic value, nonvested | $	$ 600,000	$ 100,000
Board of Directors Chairman | Restricted Stock | Vest 20% Per Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		20.00%
Management | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	3 years
Granted (in shares)	220,937
Aggregate intrinsic value, nonvested | $	$ 600,000
Management and One Director | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	244,273
Aggregate intrinsic value, nonvested | $	$ 600,000
Nonvested options (in shares)	330,000
Share-based payment arrangement, plan modification, incremental cost | $	$ 200,000
The 2015 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)	2,100,415
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares)	789,630

Stock-based Compensation - Shar

Stock-based Compensation - Share-based Payment Arrangement, Option, Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Options (Shares)
Outstanding, beginning balance (in shares)	770,000
Stock options, granted (in shares)	0
Stock options, exercised (in shares)	(123,334)
Stock options, expired (in shares)	0
Stock options, forfeited (in shares)	(546,666)
Outstanding, ending balance (in shares)	100,000	770,000
Exercisable (in shares)	66,667
Weighted Average Exercise Price
Outstanding, weighted average exercise price, beginning balance (in dollars per share)	$ 1.73
Granted (in dollars per share)	0
Exercised (in dollars per share)	1.67
Expired (in dollars per share)	0
Forfeited (in dollars per share)	0
Outstanding, weighted average exercise price, ending balance (in dollars per share)	1.55	$ 1.73
Exercisable (in dollars per share)	$ 1.68
Aggregate Intrinsic Value
Aggregate intrinsic value, outstanding, beginning balance	$ 353
Aggregate intrinsic value, exercised	304	$ 0
Aggregate intrinsic value, forfeited	606
Aggregate intrinsic value, outstanding, ending balance	38	$ 353
Aggregate intrinsic value, exercisable	$ 16

Stock-based Compensation - Intr

Stock-based Compensation - Intrinsic Value of Exercised Options (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Value at exercise date	$ 510	$ 0
Exercise price	206	0
Intrinsic value	$ 304	$ 0

Stock-based Compensation - Sh_2

Stock-based Compensation - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2020USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	100,000
Exercisable stock options outstanding (in shares)	66,667
Aggregate intrinsic value | $	$ 38
Exercise Price Range 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price (in dollars per share) | $ / shares	$ 1.28
Stock options outstanding (in shares)	50,000
Exercisable stock options outstanding (in shares)	16,667
Remaining contractual life	8 years 3 months
Aggregate intrinsic value | $	$ 32
Exercise Price Range 5
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price (in dollars per share) | $ / shares	$ 1.81
Stock options outstanding (in shares)	50,000
Exercisable stock options outstanding (in shares)	50,000
Remaining contractual life	6 years 5 months 1 day
Aggregate intrinsic value | $	$ 6

Stock-based Compensation - Sche

Stock-based Compensation - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - Share-based Payment Arrangement, Option	12 Months Ended
	Sep. 30, 2019USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options at grant date	$ 196,970
Average expected life (years)	6 years
Average expected volatile factor	29.00%
Average risk-free interest rate	2.80%
Average expected dividend yield	0.00%

Stock-based Compensation - Sh_3

Stock-based Compensation - Share-based Payment Arrangement, Expensed and Capitalized, Amount (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ (6)	$ 146
Share-based Payment Arrangement, Option | Fiscal Year 2017 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	(6)	18
Share-based Payment Arrangement, Option | Fiscal Year 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	0	128
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	580	53
Restricted Stock | Fiscal Year 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	15	38
Restricted Stock | Fiscal Year 2020 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 565	$ 15

Stock-based Compensation - Sc_2

Stock-based Compensation - Schedule of Non-vested Restricted Share Awards (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2020USD ($)shares
Shares
Nonvested, beginning balance (in shares) | shares	44,118
Granted (in shares) | shares	764,184
Vested (in shares) | shares	(333,278)
Forfeited (in shares) | shares	0
Nonvested, ending balance (in shares) | shares	475,024
Fair Value
Non-vested, beginning balance (in dollars per share) | $	$ 60
Granted (in dollars per share) | $	1,569
Vested (in dollars per share) | $	(571)
Forfeited (in dollars per share) | $	0
Non-vested, ending balance (in dollars per share) | $	$ 1,058

Equity Distribution Agreement_2

Equity Distribution Agreement and Sale of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2020	Apr. 24, 2020	Sep. 30, 2019
Subsidiary, Sale of Stock [Line Items]
Common stock, par or stated value per share (in dollars per share)	$ 0.01		$ 0.01
Equity Distribution Agreement Commission Rate		3.00%
Sales Agreement with Northland
Subsidiary, Sale of Stock [Line Items]
Common stock, par or stated value per share (in dollars per share)		$ 0.01
Equity Distribution Agreement Maximum Amount		$ 13.9
Common stock issuance (in shares)	573,199
Proceeds from Issuance of Common Stock	$ 2.2
Proceeds From Issuance Of Common Stock, Net	$ 2.1

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 230	$ 126
Cash received from income taxes	0	(172)
Supplemental noncash investing activities:
Assets acquired under financing leases	1,352	0
Promissory note from disposition of business	$ 0	$ 6,375

Earnings Per Share - Basic and

Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Loss from continuing operations	$ (978)	$ 23	$ (14,661)	$ (1,718)	$ (1,562)	$ (58)	$ (1,211)	$ (1,203)	$ (17,333)	$ (4,035)
Loss from discontinued operations, net of tax									0	(1,267)
Net loss attributable to common shareholders									$ (17,333)	$ (5,302)
Basic (in shares)									11,164,000	10,361,000
Diluted (in shares)									11,164,000	10,361,000
Basic
Continuing operations (in dollars per share)	$ (0.09)	$ 0	$ (1.41)	$ (0.17)	$ (0.15)	$ 0	$ (0.12)	$ (0.12)	$ (1.55)	$ (0.39)
Discontinued operations (in dollars per share)									0	(0.12)
Net loss (in dollars per share)									(1.55)	(0.51)
Diluted
Continuing operations (in dollars per share)									(1.55)	(0.39)
Discontinued operations (in dollars per share)									0	(0.12)
Net loss (in dollars per share)									$ (1.55)	$ (0.51)

Earnings Per Share - Anti-dilut

Earnings Per Share - Anti-dilutive Securities (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	100,000	770,000
Weighted average exercise price of stock options (in dollars per share)	$ 1.55	$ 1.73
Average market price of common stock (in dollars per share)	$ 2.44	$ 1.49

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit), intraperiod tax allocation	$ (1,249)	$ (5)
Deferred tax assets, valuation allowance	6,377	$ 3,247
Unrecognized tax benefits	$ 0

Income Taxes - Provision (Benef

Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Current	$ (1,249)	$ (13)
Deferred	0	0
Income Tax Expense (Benefit)	(1,249)	(13)
Discontinued operations – current	0	8
Total benefit for income taxes	$ (1,249)	$ (5)

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences Between U.S. Federal Statutory Rate and Company's Effective Tax Rate (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%	21.00%
State income taxes, net of U.S. federal tax benefit	4.80%	6.60%
Return to accrual adjustment	0.00%	(0.60%)
Tax credits	0.00%	0.00%
Charges without tax benefit	0.10%	(5.30%)
Valuation allowance	(19.40%)	(22.10%)
Other exclusions	0.10%	0.70%
Company’s effective tax rate	6.60%	0.30%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 4,659,000	$ 2,632,000
Accounts receivable	69,000	41,000
Inventory	883,000	393,000
Intangibles	1,259,000	707,000
Accrued expenses	132,000	53,000
Stock options	14,000	109,000
Investment in equity method investee	100,000	112,000
Other	0	0
Total deferred tax assets	7,116,000	4,047,000
Deferred tax liabilities:
Financial basis in excess of tax basis of certain assets	416,000	705,000
Other	323,000	95,000
Total deferred tax liabilities	739,000	800,000
Less valuation allowance	6,377,000	3,247,000
Net deferred taxes	$ 0	$ 0

Income Taxes - Net Operating Lo

Income Taxes - Net Operating Loss Carryforwards (Details)	Sep. 30, 2020USD ($)
Tax Year 2020
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 10,100,000
Tax Year 2019
Income Tax Examination [Line Items]
Operating loss carryforwards	2,569,000
Tax Year 2018
Income Tax Examination [Line Items]
Operating loss carryforwards	2,431,000
Tax Year 2016
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 82,820

Segment Reporting - Segment Rep

Segment Reporting - Segment Reporting Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Jan. 04, 2019carrier	Dec. 27, 2018carrier
Segment Reporting Information [Line Items]
Number of U.S. wireless carriers | carrier											4	4
Total sales									$ 50,182	$ 55,118
Gross profit	$ 4,356	$ 4,171	$ (439)	$ 3,592	$ 3,671	$ 4,587	$ 3,477	$ 1,723	11,680	13,458
Operating income (loss)									(18,530)	(3,976)
Segment assets	32,683				36,828				32,683	36,828
Operating Segments | Wireless
Segment Reporting Information [Line Items]
Total sales									21,354	22,969
Gross profit									6,580	6,362
Operating income (loss)									(2,842)	(882)
Segment assets	5,324				5,516				5,324	5,516
Operating Segments | Telco
Segment Reporting Information [Line Items]
Total sales										32,204
Gross profit									5,100	7,096
Operating income (loss)									(11,341)	134
Segment assets	12,478				22,619				12,478	22,619
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total sales									(25)	(55)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Segment assets	$ 14,880				$ 8,693				14,880	8,693
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)									$ (4,347)	$ (3,228)

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 12,239	$ 12,022	$ 11,959	$ 13,962	$ 17,859	$ 17,559	$ 12,890	$ 6,810
Gross profit	4,356	4,171	(439)	3,592	3,671	4,587	3,477	1,723	$ 11,680	$ 13,458
Loss from continuing operations	$ (978)	$ 23	$ (14,661)	$ (1,718)	$ (1,562)	$ (58)	$ (1,211)	$ (1,203)	$ (17,333)	$ (4,035)
Basic loss from continuing operations per common share (in dollars per share)	$ (0.09)	$ 0	$ (1.41)	$ (0.17)	$ (0.15)	$ 0	$ (0.12)	$ (0.12)	$ (1.55)	$ (0.39)
Diluted loss from continuing operations per common share (in dollars per share)									$ 0	$ (0.12)

Subsequent events (Details)

Subsequent events (Details) $ / shares in Units, $ in Millions	Dec. 16, 2020USD ($)	Dec. 15, 2020$ / sharesshares	Sep. 30, 2020USD ($)	Dec. 17, 2020
Revolving Credit Facility | New Credit Agreement
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity			$ 3.3
Percentage of qualified accounts receivable used in determination of maximum borrowing capacity of line of credit			80.00%
Percentage of qualified inventory used in determination of maximum borrowing capacity of line of credit			60.00%
Debt instrument, covenant, interest coverage ratio, minimum			1.25
Subsequent Event
Subsequent Event [Line Items]
Number of shares sold | shares		209,371
Price per share (in dollars per share) | $ / shares		$ 3.82
Subsequent Event | Revolving Credit Facility | New Credit Agreement
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity	$ 4
Percentage of qualified accounts receivable used in determination of maximum borrowing capacity of line of credit	80.00%
Percentage of qualified inventory used in determination of maximum borrowing capacity of line of credit				25.00%
Floor rate	4.00%
Debt instrument, covenant, interest coverage ratio, minimum	1.25