Gencor Industries (GENC) 10-Q 11 Aug 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Jun. 30, 2021	Aug. 06, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Period End Date	Jun. 30, 2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	GENCOR INDUSTRIES, INC.
Entity File Number	001-11703
Entity Tax Identification Number	59-0933147
Trading Symbol	GENC
Entity Central Index Key	0000064472
Current Fiscal Year End Date	--09-30
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Interactive Data Current	Yes
City Area Code	407
Local Phone Number	290-6000
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Address, Address Line One	5201 North Orange Blossom Trail
Entity Shell Company	false
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity Address, State or Province	FL
Entity Address, City or Town	Orlando
Entity Address, Postal Zip Code	32810
Entity Incorporation, State or Country Code	DE
Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		12,298,337
Class B Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,318,857

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Current Assets:
Cash and cash equivalents	$ 27,544,000	$ 35,584,000
Marketable securities at fair value (cost $93,077,000 at June 30, 2021 and $89,514,000 at September 30, 2020)	95,345,000	89,498,000
Accounts receivable, less allowance for doubtful accounts of $307,000 at June 30, 2021 and $442,000 at September 30, 2020	3,120,000	1,992,000
Costs and estimated earnings in excess of billings	0	6,405,000
Inventories, net	40,832,000	27,090,000
Prepaid expenses and other current assets	1,233,000	1,189,000
Total Current Assets	168,074,000	161,758,000
Property and equipment, net	12,251,000	8,341,000
Other long-term assets	948,000	995,000
Total Assets	181,273,000	171,094,000
Current Liabilities:
Accounts payable	4,406,000	1,728,000
Customer deposits	3,761,000	3,853,000
Billings in excess of costs and estimated earnings	685,000	0
Accrued expenses and other current liabilities	2,874,000	2,605,000
Current operating lease liabilities	403,000	328,000
Total Current Liabilities	12,129,000	8,514,000
Deferred and other income taxes	1,203,000	746,000
Non-current operating lease liabilities	491,000	614,000
Total Liabilities	13,823,000	9,874,000
Commitments and contingencies
Shareholders' equity:
Preferred stock, par value $.10 per share; 300,000 shares authorized; none issued	0	0
Capital in excess of par value	12,386,000	12,331,000
Retained earnings	153,602,000	147,428,000
Total Shareholders' Equity	167,450,000	161,220,000
Total Liabilities and Shareholders' Equity	181,273,000	171,094,000
Common Stock [Member]
Shareholders' equity:
Common stock	1,230,000	1,229,000
Total Shareholders' Equity	1,230,000	1,229,000
Class B Stock [Member]
Shareholders' equity:
Common stock	232,000	232,000
Total Shareholders' Equity	$ 232,000	$ 232,000

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Marketable securities, cost	$ 93,077,000	$ 89,514,000
Accounts receivable, allowance for doubtful accounts	$ 307,000	$ 442,000
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	300,000	300,000
Preferred stock, shares issued	0	0
Common Stock [Member]
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	12,298,337	12,287,337
Common stock, shares outstanding	12,298,337	12,287,337
Class B Stock [Member]
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	6,000,000	6,000,000
Common stock, shares issued	2,318,857	2,318,857
Common stock, shares outstanding	2,318,857	2,318,857

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net revenue	$ 24,919,000	$ 22,940,000	$ 65,235,000	$ 66,963,000
Cost of goods sold	19,314,000	17,555,000	50,504,000	49,920,000
Gross profit	5,605,000	5,385,000	14,731,000	17,043,000
Operating expenses:
Product engineering and development	1,176,000	849,000	3,089,000	2,304,000
Selling, general and administrative	3,202,000	2,522,000	10,235,000	7,465,000
Total operating expenses	4,378,000	3,371,000	13,324,000	9,769,000
Operating income	1,227,000	2,014,000	1,407,000	7,274,000
Other income (expense), net:
Interest and dividend income, net of fees	306,000	512,000	1,437,000	1,907,000
Net realized and unrealized gains (losses) on marketable securities	1,386,000	2,888,000	4,873,000	(1,465,000)
Other	0	(10,000)		(20,000)
Other income (expense),net	1,692,000	3,390,000	6,310,000	422,000
Income before income tax expense	2,919,000	5,404,000	7,717,000	7,696,000
Income tax expense	584,000	1,082,000	1,543,000	1,540,000
Net income	$ 2,335,000	$ 4,322,000	$ 6,174,000	$ 6,156,000
Basic Income per Common Share:
Net income per share	$ 0.16	$ 0.30	$ 0.42	$ 0.42
Diluted Income per Common Share:
Net income per share	$ 0.16	$ 0.29	$ 0.42	$ 0.42

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Shareholders' Equity - USD ($)	Total	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Common Stock [Member]	Class B Stock [Member]
Beginning balance at Sep. 30, 2019	$ 155,515,000	$ 12,159,000	$ 141,897,000	$ 1,228,000	$ 231,000
Beginning balance, shares at Sep. 30, 2019				12,277,337	2,308,857
Net income	2,489,000		2,489,000
Stock-based compensation	18,000	18,000
Ending balance at Dec. 31, 2019	158,022,000	12,177,000	144,386,000	$ 1,228,000	$ 231,000
Ending balance, shares at Dec. 31, 2019				12,277,337	2,308,857
Beginning balance at Sep. 30, 2019	155,515,000	12,159,000	141,897,000	$ 1,228,000	$ 231,000
Beginning balance, shares at Sep. 30, 2019				12,277,337	2,308,857
Net income	6,156,000
Ending balance at Jun. 30, 2020	161,827,000	12,313,000	148,053,000	$ 1,229,000	$ 232,000
Ending balance, shares at Jun. 30, 2020				12,287,337	2,318,857
Beginning balance at Dec. 31, 2019	158,022,000	12,177,000	144,386,000	$ 1,228,000	$ 231,000
Beginning balance, shares at Dec. 31, 2019				12,277,337	2,308,857
Net income	(655,000)		(655,000)
Stock-based compensation	17,000	17,000
Ending balance at Mar. 31, 2020	157,384,000	12,194,000	143,731,000	$ 1,228,000	$ 231,000
Ending balance, shares at Mar. 31, 2020				12,277,337	2,308,857
Net income	4,322,000		4,322,000
Stock-based compensation	18,000	18,000
Stock options exercised	103,000	101,000		$ 1,000	$ 1,000
Stock options exercised, shares				10,000	10,000
Ending balance at Jun. 30, 2020	161,827,000	12,313,000	148,053,000	$ 1,229,000	$ 232,000
Ending balance, shares at Jun. 30, 2020				12,287,337	2,318,857
Beginning balance at Sep. 30, 2020	161,220,000	12,331,000	147,428,000	$ 1,229,000	$ 232,000
Beginning balance, shares at Sep. 30, 2020				12,287,337	2,318,857
Net income	1,551,000		1,551,000
Ending balance at Dec. 31, 2020	162,771,000	12,331,000	148,979,000	$ 1,229,000	$ 232,000
Ending balance, shares at Dec. 31, 2020				12,287,337	2,318,857
Beginning balance at Sep. 30, 2020	161,220,000	12,331,000	147,428,000	$ 1,229,000	$ 232,000
Beginning balance, shares at Sep. 30, 2020				12,287,337	2,318,857
Net income	6,174,000
Ending balance at Jun. 30, 2021	167,450,000	12,386,000	153,602,000	$ 1,230,000	$ 232,000
Ending balance, shares at Jun. 30, 2021				12,298,337	2,318,857
Beginning balance at Dec. 31, 2020	162,771,000	12,331,000	148,979,000	$ 1,229,000	$ 232,000
Beginning balance, shares at Dec. 31, 2020				12,287,337	2,318,857
Net income	2,288,000		2,288,000
Stock options exercised	56,000	55,000		$ 1,000
Stock options exercised, shares				11,000
Ending balance at Mar. 31, 2021	165,115,000	12,386,000	151,267,000	$ 1,230,000	$ 232,000
Ending balance, shares at Mar. 31, 2021				12,298,337	2,318,857
Net income	2,335,000		2,335,000
Ending balance at Jun. 30, 2021	$ 167,450,000	$ 12,386,000	$ 153,602,000	$ 1,230,000	$ 232,000
Ending balance, shares at Jun. 30, 2021				12,298,337	2,318,857

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operations:
Net income	$ 6,174,000	$ 6,156,000
Adjustments to reconcile net income to cash flows provided by operating activities:
Purchases of marketable securities	(101,040,000)	(112,668,000)
Proceeds from sale and maturity of marketable securities	99,638,000	110,805,000
Change in fair value of marketable securities	(4,445,000)	1,510,000
Deferred income taxes	457,000	(2,066,000)
Depreciation and amortization	1,931,000	1,244,000
Provision for doubtful accounts	125,000	50,000
Stock-based compensation		53,000
Changes in assets and liabilities:
Accounts receivable	(1,253,000)	(56,000)
Costs and estimated earnings in excess of billings	7,090,000	3,774,000
Inventories (excluding the effect of the Blaw-Knox acquisition)	(3,357,000)	804,000
Prepaid expenses and other current assets	(44,000)	(1,150,000)
Accounts payable	2,678,000	182,000
Customer deposits	(92,000)	733,000
Accrued expenses and other current liabilities	268,000	34,000
Total adjustments	1,956,000	3,249,000
Cash flows provided by operating activities	8,130,000	9,405,000
Cash flows used in investing activities:
Acquisition of Blaw-Knox assets	(13,777,000)
Capital expenditures	(2,449,000)	(1,246,000)
Cash flows used in investing activities	(16,226,000)	(1,246,000)
Cash flows from financing activities:
Proceeds from stock option exercises	56,000	103,000
Cash flows provided by financing activities	56,000	103,000
Net increase (decrease) in cash	(8,040,000)	8,262,000
Cash at:
Beginning of period	35,584,000	10,302,000
End of period	27,544,000	$ 18,564,000
Non-cash investing activities:
Operating lease right of use assets	254,000
Operating lease liabilities	$ 254,000

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 1 - Basis of Presentation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q S-X. The accompanying Condensed Consolidated Balance Sheet at September 30, 2020 has been derived from the audited financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. On October 1, 2020, the Company acquired the Blaw-Knox paver line and associated assets, including inventory, fixed assets and related intellectual property, from Volvo Construction Equipment North America, LLC (“Volvo CE”). The acquisition provides the Company entry into the asphalt paver sector of the asphalt industry. The acquisition was accounted for as a business combination under ASC 805, “Business Combinations.” The initial purchase price of approximately $14.4 million, which was subject to post-closing adjustments, was funded by cash on hand. After post-closing adjustments transacted during quarter ended March 31, 2021, the final purchase price was $13.8 million, including $10.4 million in inventory and $3.4 million in fixed assets. There were no liabilities assumed. The accompanying condensed consolidated financial statements as of June 30, 2021, include the assets, liabilities and operating results of the paver line for the quarter and nine For further information, refer to the consolidated financial statements and notes thereto included in the Gencor Industries, Inc. Annual Report on Form 10-K for the year ended September 30, 2020. Recent Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases 2016-02”). right-of-use 2016-02 2016-02 2016-02 right-of-use one-year 2016-02, In August 2018, the FASB issued ASU 2018-13, 2018-13). 2018-13 No other accounting pronouncements recently issued or newly effective have had, or are expected to have, a material impact on the Company’s consolidated financial statements. COVID-19 The Company continues to monitor and evaluate the risks related to the COVID-19 COVID-19 COVID-19 COVID-19 COVID-19.

Marketable Securities and Fair

Marketable Securities and Fair Value Measurements	9 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Marketable Securities and Fair Value Measurements	Note 2 - Marketable Securities and Fair Value Measurements Marketable debt and equity securities are categorized as trading securities and are thus marked to market and stated at fair value. Fair value is determined using the quoted closing or latest bid prices for Level 1 investments and market standard valuation methodologies for Level 2 investments. Realized gains and losses on investment transactions are determined by specific identification and are recognized as incurred in the condensed consolidated statements of income. Changes in net unrealized gains and losses are reported in the condensed consolidated statements of income in the current period and represent the change in the fair value of investment holdings during the period. Fair Value Measurements The fair value of financial instruments is presented based upon a hierarchy of levels that prioritizes the inputs of valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The fair value of marketable equity securities, mutual funds, exchange-traded funds, government securities, and cash and money funds are substantially based on quoted market prices (Level 1). Corporate and municipal bonds are valued using market standard valuation methodologies, including: discounted cash flow methodologies, matrix pricing or other similar techniques. The inputs to these market standard valuation methodologies include, but are not limited to: interest rates, credit standing of the issuer or counterparty, industry sector of the issuer, coupon rate, call provisions, maturity, estimated duration and assumptions regarding liquidity and estimated future cash flows. In addition to bond characteristics, the valuation methodologies incorporate market data, such as actual trades completed, bids and actual dealer quotes, where such information is available. Accordingly, the estimated fair values are based on available market information and judgments about financial instruments (Level 2). Fair values of the Level 2 investments, if any, are provided by the Company’s professional investment management firm. The following table sets forth, by level, within the fair value hierarchy, the Company’s marketable securities measured at fair value as of June 30, 2021: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 14,679,000 $ — $ — $ 14,679,000 Mutual Funds 10,341,000 — — 10,341,000 Exchange-Traded Funds 9,545,000 — — 9,545,000 Corporate Bonds — 25,229,000 — 25,229,000 Government Securities 30,998,000 — — 30,998,000 Cash and Money Funds 4,553,000 — — 4,553,000 Total $ 70,116,000 $ 25,229,000 $ — $ 95,345,000 Changes in net unrealized gains and (losses) included in the condensed consolidated statements of income for the quarter and nine months ended June 30, 2021, were $(219,000) and $2,284,000, respectively. The following table sets forth by level, within the fair value hierarchy, the Company’s assets measured at fair value as of September 30, 2020: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 11,949,000 $ — $ — $ 11,949,000 Mutual Funds 9,595,000 — — 9,595,000 Exchange-Traded Funds 10,344,000 — — 10,344,000 Corporate Bonds — 27,877,000 — 27,877,000 Government Securities 16,147,000 — — 16,147,000 Cash and Money Funds 13,586,000 — — 13,586,000 Total $ 61,621,000 $ 27,877,000 $ — $ 89,498,000 Changes in net unrealized gains and (losses) included in the condensed consolidated statements of income for the quarter and nine months ended June 30, 2020, were $3,979,000 and $(857,000), respectively. In the fourth quarter of fiscal 2020, the Company liquidated approximately $17.0 million of its investments. The cash was used to fund the acquisition of the Blaw-Knox paver line and associated assets, including inventory, fixed assets and related intellectual property, from Volvo CE, as well as pay for capital expenditures and other startup costs to get the paver line’s manufacturing facility ready for production. The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short-term nature of these items.

Inventories

Inventories	9 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Inventories	Note 3 – Inventories Inventories are valued at the lower of cost or net realizable value. Net realizable value is defined as the estimated selling price of goods less reasonable costs of completion and delivery. Appropriate consideration is given to obsolescence, excessive levels, deterioration, possible alternative uses and other factors in determining net realizable value. The cost of work in process and finished goods includes materials, direct labor, variable costs and overhead. The Company evaluates the need to record inventory adjustments on all inventories, including raw material, work in process, finished goods, spare parts and used equipment. Used equipment acquired by the Company on trade-in three four Net inventories at June 30, 2021 and September 30, 2020 consist of the following: June 30, 2021 September 30, 2020 Raw materials $ 27,057,000 $ 14,607,000 Work in process 7,179,000 3,633,000 Finished goods 6,556,000 8,810,000 Used equipment 40,000 40,000 $ 40,832,000 $ 27,090,000 As discussed in Note 1 to the condensed consolidated financial statements, the Company acquired $ million of inventory in the Blaw-Know acquisition. Such inventories, adjusted for any purchases and sales since the acquisition date, is included in the net inventories as of June 30, 2021. Slow-moving and obsolete i n $ and $ at June 30, 2021 and September 30, 2020, respectively.

Costs and Estimated Earnings in

Costs and Estimated Earnings in Excess of Billings and Billings in Excess of Costs and Estimated Earnings	9 Months Ended
	Jun. 30, 2021
Text Block [Abstract]
Costs and Estimated Earnings in Excess of Billings and Billings in Excess of Costs and Estimated Earnings [Text block]	Note 4 – Costs and Estimated Earnings in Excess of Billings and Billings in Excess of Costs and Estimated Earnings Billings in excess of costs and estimated earnings on uncompleted contracts as of June 30, 2021, and costs and estimated earnings in excess of billings on uncompleted contracts as of September 30, 2020, consist of the following: June 30, September 30, 2020 Costs incurred on uncompleted contracts $ 7,975,000 $ 10,390,000 Estimated earnings 3,368,000 4,680,000 11,343,000 15,070,000 Billings to date 12,028,000 8,665,000 Costs and estimated earnings in excess of billings $ — $ 6,405,000 Bill ings in excess of costs and estimated earnings $ 685,000 $ —

Earnings per Share Data

Earnings per Share Data	9 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings per Share Data	Note 5 – Earnings per Share Data The following table sets forth the computation of basic and diluted earnings per share for the quarters and nine months ended June 30, 2021 and 2020: Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Net Income $ 2,335,000 $ 4,322,000 $ 6,174,000 $ 6,156,000 Common Shares: Weighted average common shares outstanding 14,617,000 14,601,000 14,613,000 14,592,000 Effect of dilutive stock options 132,000 118,000 129,000 125,000 Diluted shares outstanding 14,749,000 14,719,000 14,742,000 14,717,000 Basic: Net earnings per share $ 0.16 $ 0.30 $ 0.42 $ 0.42 Diluted: Net earnings per share $ 0.16 $ 0.29 $ 0.42 $ 0.42 Basic earnings per share are based on the weighted-average number of shares outstanding. Diluted earnings per share are based on the sum of the weighted average number of shares outstanding plus common stock equivalents. The weighted-average shares issuable upon the exercise of stock options included in the diluted earnings per share calculation for the quarter and months ended June , were and , respectively, which equates to and dilutive common stock equivalents, respectively. The weighted-average shares issuable upon the exercise of stock options included in the diluted earnings per share calculation for the quarter and months ended June , were and , respectively, which equates to and dilutive common stock equivalents, respectively. There were weighted-average shares issuable upon the exercise of stock options, which were not included in the diluted earnings per share calculation for the quarter ended June , because they were anti-dilutive. There were anti-dilutive shares for the quarter and months ended June , .

Customers with 10% (or greater)

Customers with 10% (or greater) of Net Revenues	9 Months Ended
	Jun. 30, 2021
Risks and Uncertainties [Abstract]
Customers with 10% (or greater) of Net Revenues	Note 6 – Customers with 10% (or greater) of Net Revenues During the quarter ended June 30, 2021, one customer accounted for 17.5% of net revenues. During the nine months ended June 30, 2021, no customer accounted for 10% or more of net revenues. During the quarter ended June 30, 2020, three customers accounted for 16.5%, 13.3% and 12.6% of net revenues. During the nine months ended June 30, 2020, no customer accounted for 10% or more of net revenues.

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Note 7 – Income Taxes Income taxes are provided for the tax effects of transactions reported in the consolidated financial statements and primarily consist of taxes currently due, plus deferred taxes. The Company recognizes deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the consolidated financial statements or tax returns using current tax rates. The Company and its domestic subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are measured using the rates expected to apply to taxable income in the years in which the temporary differences are expected to reverse and the credits are expected to be used. The effect on deferred tax assets and liabilities of the change in tax rates is recognized in income in the period that includes the enactment date. All available evidence, both positive and negative, is considered to determine whether, based on the weight of that evidence, the Company is more likely than not to realize the benefit of a deferred tax asset and whether a valuation allowance is needed for some portion or all of a deferred tax asset. No such valuation allowances were recorded as of June 30, 2021 and September 30, 2020. The Company’s income tax provision is based on management’s estimate of the effective tax rate for the full year. The tax provision in any period will be affected by, among other things, permanent, as well as temporary differences in the deductibility of certain items, in addition to changes in tax legislation. As a result, the Company may experience significant fluctuations in the effective book tax rate (that is, its tax expense divided by pre-tax

Revenue Recognition and Related

Revenue Recognition and Related Costs	9 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition and Related Costs	Note 8 – Revenue Recognition and Related Costs The Company recognizes revenue under ASU No. 2014-09, Revenue from Contracts with Customers nine Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Equipment sales recognized over time $ 6,507,000 $ 10,350,000 $ 14,509,000 $ 32,269,000 Equipment sales recognized at a point in time 12,258,000 8,995,000 31,959,000 20,946,000 Parts and component sales 5,240,000 2,671,000 16,001,000 10,492,000 Freight revenue 996,000 822,000 2,888,000 2,926,000 Other (82,000 ) 102,000 (122,000 ) 330,000 Net revenue $ 24,919,000 $ 22,940,000 $ 65,235,000 $ 66,963,000 Revenues from contracts with customers for the design, manufacture and sale of custom equipment are recognized over time when the performance obligation is satisfied by transferring control of the equipment. Control of the equipment transfers over time as the equipment is unique to the specific contract and thus does not create an asset with an alternative use to the Company. Revenues and costs are recognized in proportion to actual labor costs incurred, as compared with total estimated labor costs expected to be incurred, during the entire contract. All incremental costs related to obtaining a contract are expensed as incurred as the amortization period is less than one year. Changes to total estimated contract costs or losses, if any, are recognized in the period in which they are determined. Contract assets (excluding accounts receivable) under contracts with customers represent revenue recognized in excess of amounts billed on equipment sales recognized over time. These contract assets were zero at September 30, 2020. Contract assets at September 30, 2020 are included in current assets as costs and estimated earnings in excess of billings on the Company’s condensed consolidated balance sheet at September 30, 2020. Revenues from all other contracts for the design and manufacture of equipment, for service and for parts sales, net of any discounts and return allowances, are recorded at a point in time when control of the goods or services has been transferred. Control of the goods or service typically transfers at time of shipment or upon completion of the service. Payment for equipment under contract with customers is typically due prior to shipment. Payment for services under contract with customers is due as certain milestones are completed. Accounts receivable related to contracts with customers for equipment sales was $268,000 at June 30, 2021 and $223,000 at September 30, 2020. Product warranty costs are estimated using historical experience and known issues and are charged to production costs as revenue is recognized. Provisions for estimated returns and allowances and other adjustments are provided for in the same period the related sales are recorded. Returns and allowances, which reduce product revenue, are estimated using historical experience. Under certain contracts with customers, recognition of a portion of the consideration received may be deferred and recorded as a contract liability if the Company has to satisfy a future obligation, such as to provide installation assistance. There were no contract liabilities other than customer deposits and billings in excess of costs and estimated earnings at June 30, 2021 and customer deposits at September 30, 2020. Customer deposits related to contracts with customers were $ at June , and $ at September , , and are included in current liabilities on the Company’s condensed consolidated balance sheets at June , and September , , respectively. 685,000 at June 30, 2021 and zero at September 30, 2020. These contract liabilities represent billings in excess of revenue recognized on equipment sales recognized over time, and are included current liabilities on the Company’s condensed consolidated balance sheet at June 30, 2021. The Company records revenues earned for shipping and handling as freight revenue at the time of shipment, regardless of whether or not it is identified as a separate performance obligation. The cost of shipping and handling is classified as production costs concurrently with the revenue recognition. All product engineering and development costs, and selling, general and administrative expenses are charged to operations as incurred. Provision is made for any anticipated contract losses in the period that the loss becomes evident. The allowance for doubtful accounts is determined by performing a specific review of all account balances greater than 90 days past due and other higher risk amounts to determine collectability, and also adjusting for any known customer payment issues with account balances in the less-than-90-day

Leases

Leases	9 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Note 9 – Leases The Company leases certain equipment under non-cancelable On August 28, 2020, the Company entered into a three 2016-02, one-year 2016-02, For the quarter and nine months ended June 30, 2021, operating lease costs were $106,000 and $301,000, respectively, and cash payments related to these operating leases were $105,000 and $349,000, respectively. Other information concerning the Company’s operating lease accounted for under ASC 842 guidelines as of June 30, 2021 and September 30, 2020, is as follows: June 30, 2021 September 30, 2020 Operating lease ROU asset included in other long-term assets $ 894,000 $ 942,000 Current operating lease liability 403,000 328,000 Non-current 491,000 614,000 Weighted average remaining lease term (in years) 2.25 2.92 Weighted average discount rate used in calculating ROU asset 4.0 % 4.0 % Future annual minimum lease payments as of June 30, 2021 are as follows: Fiscal Year Annual Lease Payments 2021 (remaining 3 months) $ 116,000 2022 419,000 2023 400,000 Total 935,000 Less interest (41,000 ) Present value of lease liabilities $ 894,000

Segment Information

Segment Information	9 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Information	Note 10 – Segment Information The Company has one reporting segment, equipment for the highway construction industry. Based on evaluation of the criteria of ASC 280 – Segment Reporting, including the nature of products and services, the nature of the production processes, the type of customers and the methods used to distribute products and services, the Company determined that its operating segments meet the requirements for aggregation. The Company designs, manufactures and sells asphalt plants and pavers, combustion systems and fluid heat transfer systems, for the highway construction industry and environmental and petrochemical markets. The Company’s products are manufactured at three facilities in the United States. The Company also services and sells spare parts for its equipment.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases 2016-02”). right-of-use 2016-02 2016-02 2016-02 right-of-use one-year 2016-02, In August 2018, the FASB issued ASU 2018-13, 2018-13). 2018-13 No other accounting pronouncements recently issued or newly effective have had, or are expected to have, a material impact on the Company’s consolidated financial statements.
COVID-19 Pandemic	COVID-19 The Company continues to monitor and evaluate the risks related to the COVID-19 COVID-19 COVID-19 COVID-19 COVID-19.
Marketable Securities	Marketable debt and equity securities are categorized as trading securities and are thus marked to market and stated at fair value. Fair value is determined using the quoted closing or latest bid prices for Level 1 investments and market standard valuation methodologies for Level 2 investments. Realized gains and losses on investment transactions are determined by specific identification and are recognized as incurred in the condensed consolidated statements of income. Changes in net unrealized gains and losses are reported in the condensed consolidated statements of income in the current period and represent the change in the fair value of investment holdings during the period.
Fair Value Measurements	Fair Value Measurements The fair value of financial instruments is presented based upon a hierarchy of levels that prioritizes the inputs of valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The fair value of marketable equity securities, mutual funds, exchange-traded funds, government securities, and cash and money funds are substantially based on quoted market prices (Level 1). Corporate and municipal bonds are valued using market standard valuation methodologies, including: discounted cash flow methodologies, matrix pricing or other similar techniques. The inputs to these market standard valuation methodologies include, but are not limited to: interest rates, credit standing of the issuer or counterparty, industry sector of the issuer, coupon rate, call provisions, maturity, estimated duration and assumptions regarding liquidity and estimated future cash flows. In addition to bond characteristics, the valuation methodologies incorporate market data, such as actual trades completed, bids and actual dealer quotes, where such information is available. Accordingly, the estimated fair values are based on available market information and judgments about financial instruments (Level 2). Fair values of the Level 2 investments, if any, are provided by the Company’s professional investment management firm. The following table sets forth, by level, within the fair value hierarchy, the Company’s marketable securities measured at fair value as of June 30, 2021: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 14,679,000 $ — $ — $ 14,679,000 Mutual Funds 10,341,000 — — 10,341,000 Exchange-Traded Funds 9,545,000 — — 9,545,000 Corporate Bonds — 25,229,000 — 25,229,000 Government Securities 30,998,000 — — 30,998,000 Cash and Money Funds 4,553,000 — — 4,553,000 Total $ 70,116,000 $ 25,229,000 $ — $ 95,345,000 Changes in net unrealized gains and (losses) included in the condensed consolidated statements of income for the quarter and nine months ended June 30, 2021, were $(219,000) and $2,284,000, respectively. The following table sets forth by level, within the fair value hierarchy, the Company’s assets measured at fair value as of September 30, 2020: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 11,949,000 $ — $ — $ 11,949,000 Mutual Funds 9,595,000 — — 9,595,000 Exchange-Traded Funds 10,344,000 — — 10,344,000 Corporate Bonds — 27,877,000 — 27,877,000 Government Securities 16,147,000 — — 16,147,000 Cash and Money Funds 13,586,000 — — 13,586,000 Total $ 61,621,000 $ 27,877,000 $ — $ 89,498,000 Changes in net unrealized gains and (losses) included in the condensed consolidated statements of income for the quarter and nine months ended June 30, 2020, were $3,979,000 and $(857,000), respectively. In the fourth quarter of fiscal 2020, the Company liquidated approximately $17.0 million of its investments. The cash was used to fund the acquisition of the Blaw-Knox paver line and associated assets, including inventory, fixed assets and related intellectual property, from Volvo CE, as well as pay for capital expenditures and other startup costs to get the paver line’s manufacturing facility ready for production. The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short-term nature of these items.
Inventories	Inventories are valued at the lower of cost or net realizable value. Net realizable value is defined as the estimated selling price of goods less reasonable costs of completion and delivery. Appropriate consideration is given to obsolescence, excessive levels, deterioration, possible alternative uses and other factors in determining net realizable value. The cost of work in process and finished goods includes materials, direct labor, variable costs and overhead. The Company evaluates the need to record inventory adjustments on all inventories, including raw material, work in process, finished goods, spare parts and used equipment. Used equipment acquired by the Company on trade-in three four
Earnings per Share	The following table sets forth the computation of basic and diluted earnings per share for the quarters and nine months ended June 30, 2021 and 2020: Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Net Income $ 2,335,000 $ 4,322,000 $ 6,174,000 $ 6,156,000 Common Shares: Weighted average common shares outstanding 14,617,000 14,601,000 14,613,000 14,592,000 Effect of dilutive stock options 132,000 118,000 129,000 125,000 Diluted shares outstanding 14,749,000 14,719,000 14,742,000 14,717,000 Basic: Net earnings per share $ 0.16 $ 0.30 $ 0.42 $ 0.42 Diluted: Net earnings per share $ 0.16 $ 0.29 $ 0.42 $ 0.42 Basic earnings per share are based on the weighted-average number of shares outstanding. Diluted earnings per share are based on the sum of the weighted average number of shares outstanding plus common stock equivalents. The weighted-average shares issuable upon the exercise of stock options included in the diluted earnings per share calculation for the quarter and months ended June , were and , respectively, which equates to and dilutive common stock equivalents, respectively. The weighted-average shares issuable upon the exercise of stock options included in the diluted earnings per share calculation for the quarter and months ended June , were and , respectively, which equates to and dilutive common stock equivalents, respectively. There were weighted-average shares issuable upon the exercise of stock options, which were not included in the diluted earnings per share calculation for the quarter ended June , because they were anti-dilutive. There were anti-dilutive shares for the quarter and months ended June , .
Income Taxes	Income taxes are provided for the tax effects of transactions reported in the consolidated financial statements and primarily consist of taxes currently due, plus deferred taxes. The Company recognizes deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the consolidated financial statements or tax returns using current tax rates. The Company and its domestic subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are measured using the rates expected to apply to taxable income in the years in which the temporary differences are expected to reverse and the credits are expected to be used. The effect on deferred tax assets and liabilities of the change in tax rates is recognized in income in the period that includes the enactment date. All available evidence, both positive and negative, is considered to determine whether, based on the weight of that evidence, the Company is more likely than not to realize the benefit of a deferred tax asset and whether a valuation allowance is needed for some portion or all of a deferred tax asset. No such valuation allowances were recorded as of June 30, 2021 and September 30, 2020. The Company’s income tax provision is based on management’s estimate of the effective tax rate for the full year. The tax provision in any period will be affected by, among other things, permanent, as well as temporary differences in the deductibility of certain items, in addition to changes in tax legislation. As a result, the Company may experience significant fluctuations in the effective book tax rate (that is, its tax expense divided by pre-tax
Revenue Recognition and Related Costs	The Company recognizes revenue under ASU No. 2014-09, Revenue from Contracts with Customers nine Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Equipment sales recognized over time $ 6,507,000 $ 10,350,000 $ 14,509,000 $ 32,269,000 Equipment sales recognized at a point in time 12,258,000 8,995,000 31,959,000 20,946,000 Parts and component sales 5,240,000 2,671,000 16,001,000 10,492,000 Freight revenue 996,000 822,000 2,888,000 2,926,000 Other (82,000 ) 102,000 (122,000 ) 330,000 Net revenue $ 24,919,000 $ 22,940,000 $ 65,235,000 $ 66,963,000 Revenues from contracts with customers for the design, manufacture and sale of custom equipment are recognized over time when the performance obligation is satisfied by transferring control of the equipment. Control of the equipment transfers over time as the equipment is unique to the specific contract and thus does not create an asset with an alternative use to the Company. Revenues and costs are recognized in proportion to actual labor costs incurred, as compared with total estimated labor costs expected to be incurred, during the entire contract. All incremental costs related to obtaining a contract are expensed as incurred as the amortization period is less than one year. Changes to total estimated contract costs or losses, if any, are recognized in the period in which they are determined. Contract assets (excluding accounts receivable) under contracts with customers represent revenue recognized in excess of amounts billed on equipment sales recognized over time. These contract assets were zero at September 30, 2020. Contract assets at September 30, 2020 are included in current assets as costs and estimated earnings in excess of billings on the Company’s condensed consolidated balance sheet at September 30, 2020. Revenues from all other contracts for the design and manufacture of equipment, for service and for parts sales, net of any discounts and return allowances, are recorded at a point in time when control of the goods or services has been transferred. Control of the goods or service typically transfers at time of shipment or upon completion of the service. Payment for equipment under contract with customers is typically due prior to shipment. Payment for services under contract with customers is due as certain milestones are completed. Accounts receivable related to contracts with customers for equipment sales was $268,000 at June 30, 2021 and $223,000 at September 30, 2020. Product warranty costs are estimated using historical experience and known issues and are charged to production costs as revenue is recognized. Provisions for estimated returns and allowances and other adjustments are provided for in the same period the related sales are recorded. Returns and allowances, which reduce product revenue, are estimated using historical experience. Under certain contracts with customers, recognition of a portion of the consideration received may be deferred and recorded as a contract liability if the Company has to satisfy a future obligation, such as to provide installation assistance. There were no contract liabilities other than customer deposits and billings in excess of costs and estimated earnings at June 30, 2021 and customer deposits at September 30, 2020. Customer deposits related to contracts with customers were $ at June , and $ at September , , and are included in current liabilities on the Company’s condensed consolidated balance sheets at June , and September , , respectively. 685,000 at June 30, 2021 and zero at September 30, 2020. These contract liabilities represent billings in excess of revenue recognized on equipment sales recognized over time, and are included current liabilities on the Company’s condensed consolidated balance sheet at June 30, 2021. The Company records revenues earned for shipping and handling as freight revenue at the time of shipment, regardless of whether or not it is identified as a separate performance obligation. The cost of shipping and handling is classified as production costs concurrently with the revenue recognition. All product engineering and development costs, and selling, general and administrative expenses are charged to operations as incurred. Provision is made for any anticipated contract losses in the period that the loss becomes evident. The allowance for doubtful accounts is determined by performing a specific review of all account balances greater than 90 days past due and other higher risk amounts to determine collectability, and also adjusting for any known customer payment issues with account balances in the less-than-90-day
Leases	The Company leases certain equipment under non-cancelable On August 28, 2020, the Company entered into a three 2016-02, one-year 2016-02, For the quarter and nine months ended June 30, 2021, operating lease costs were $106,000 and $301,000, respectively, and cash payments related to these operating leases were $105,000 and $349,000, respectively.

Marketable Securities and Fai_2

Marketable Securities and Fair Value Measurements (Tables)	9 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Company's Marketable Securities Measured at Fair Value	The following table sets forth, by level, within the fair value hierarchy, the Company’s marketable securities measured at fair value as of June 30, 2021: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 14,679,000 $ — $ — $ 14,679,000 Mutual Funds 10,341,000 — — 10,341,000 Exchange-Traded Funds 9,545,000 — — 9,545,000 Corporate Bonds — 25,229,000 — 25,229,000 Government Securities 30,998,000 — — 30,998,000 Cash and Money Funds 4,553,000 — — 4,553,000 Total $ 70,116,000 $ 25,229,000 $ — $ 95,345,000 Changes in net unrealized gains and (losses) included in the condensed consolidated statements of income for the quarter and nine months ended June 30, 2021, were $(219,000) and $2,284,000, respectively. The following table sets forth by level, within the fair value hierarchy, the Company’s assets measured at fair value as of September 30, 2020: Fair Value Measurements Level 1 Level 2 Level 3 Total Equities $ 11,949,000 $ — $ — $ 11,949,000 Mutual Funds 9,595,000 — — 9,595,000 Exchange-Traded Funds 10,344,000 — — 10,344,000 Corporate Bonds — 27,877,000 — 27,877,000 Government Securities 16,147,000 — — 16,147,000 Cash and Money Funds 13,586,000 — — 13,586,000 Total $ 61,621,000 $ 27,877,000 $ — $ 89,498,000

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Net Inventories	Net inventories at June 30, 2021 and September 30, 2020 consist of the following: June 30, 2021 September 30, 2020 Raw materials $ 27,057,000 $ 14,607,000 Work in process 7,179,000 3,633,000 Finished goods 6,556,000 8,810,000 Used equipment 40,000 40,000 $ 40,832,000 $ 27,090,000

Costs and Estimated Earnings _2

Costs and Estimated Earnings in Excess of Billings and Billings in Excess of Costs and Estimated Earnings (Tables)	9 Months Ended
	Jun. 30, 2021
Text Block [Abstract]
Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts	June 30, September 30, 2020 Costs incurred on uncompleted contracts $ 7,975,000 $ 10,390,000 Estimated earnings 3,368,000 4,680,000 11,343,000 15,070,000 Billings to date 12,028,000 8,665,000 Costs and estimated earnings in excess of billings $ — $ 6,405,000 Bill ings in excess of costs and estimated earnings $ 685,000 $ —

Earnings per Share Data (Tables

Earnings per Share Data (Tables)	9 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the quarters and nine months ended June 30, 2021 and 2020: Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Net Income $ 2,335,000 $ 4,322,000 $ 6,174,000 $ 6,156,000 Common Shares: Weighted average common shares outstanding 14,617,000 14,601,000 14,613,000 14,592,000 Effect of dilutive stock options 132,000 118,000 129,000 125,000 Diluted shares outstanding 14,749,000 14,719,000 14,742,000 14,717,000 Basic: Net earnings per share $ 0.16 $ 0.30 $ 0.42 $ 0.42 Diluted: Net earnings per share $ 0.16 $ 0.29 $ 0.42 $ 0.42

Revenue Recognition and Relat_2

Revenue Recognition and Related Costs (Tables)	9 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Company's Net Revenue by Major Source	The Company recognizes revenue under ASU No. 2014-09, Revenue from Contracts with Customers nine Quarter Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Equipment sales recognized over time $ 6,507,000 $ 10,350,000 $ 14,509,000 $ 32,269,000 Equipment sales recognized at a point in time 12,258,000 8,995,000 31,959,000 20,946,000 Parts and component sales 5,240,000 2,671,000 16,001,000 10,492,000 Freight revenue 996,000 822,000 2,888,000 2,926,000 Other (82,000 ) 102,000 (122,000 ) 330,000 Net revenue $ 24,919,000 $ 22,940,000 $ 65,235,000 $ 66,963,000

Leases (Tables)

Leases (Tables)	9 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Summary of Other Information Concerning the Company's Operating Lease	Other information concerning the Company’s operating lease accounted for under ASC 842 guidelines as of June 30, 2021 and September 30, 2020, is as follows: June 30, 2021 September 30, 2020 Operating lease ROU asset included in other long-term assets $ 894,000 $ 942,000 Current operating lease liability 403,000 328,000 Non-current 491,000 614,000 Weighted average remaining lease term (in years) 2.25 2.92 Weighted average discount rate used in calculating ROU asset 4.0 % 4.0 %
Summary of Future Annual Minimum Lease Payments	Future annual minimum lease payments as of June 30, 2021 are as follows: Fiscal Year Annual Lease Payments 2021 (remaining 3 months) $ 116,000 2022 419,000 2023 400,000 Total 935,000 Less interest (41,000 ) Present value of lease liabilities $ 894,000

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) - USD ($)	Oct. 01, 2020	Jun. 30, 2021	Oct. 09, 2020	Aug. 28, 2020
Basis Of Presentation [Line Items]
Operating lease right of use assets		$ 254,000		$ 970,000
Operating lease term				3 years
New Lease Agreement [Member]
Basis Of Presentation [Line Items]
Operating lease right of use assets			$ 254,000	$ 970,000
BlawKnox Paver [Member]
Basis Of Presentation [Line Items]
Business combination purchase price	$ 14,400,000	13,800,000
Business combination included in inventory		10,400,000
Business combination included in fixed assets		$ 3,400,000
BlawKnox Paver [Member] | New Lease Agreement [Member]
Basis Of Presentation [Line Items]
Operating lease right of use assets			$ 254,000
Operating lease term			1 year

Marketable Securities and Fai_3

Marketable Securities and Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Marketable Securities [Line Items]
Net unrealized gains	$ (219,000)	$ 3,979,000	$ 2,284,000	$ (857,000)
BlawKnox Paver [Member]
Marketable Securities [Line Items]
Liquidity On Investments					$ 17,000,000

Marketable Securities and Fai_4

Marketable Securities and Fair Value Measurements - Company's Assets Measured at Fair Value (Detail) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Investment Holdings [Line Items]
Total	$ 95,345,000	$ 89,498,000
Equities [Member]
Investment Holdings [Line Items]
Total	14,679,000	11,949,000
Mutual Funds [Member]
Investment Holdings [Line Items]
Total	10,341,000	9,595,000
Exchange Traded Funds [Member]
Investment Holdings [Line Items]
Total	9,545,000	10,344,000
Corporate Bonds [Member]
Investment Holdings [Line Items]
Total	25,229,000	27,877,000
Government Securities [Member]
Investment Holdings [Line Items]
Total	30,998,000	16,147,000
Cash and Money Funds [Member]
Investment Holdings [Line Items]
Total	4,553,000	13,586,000
Level 1 [Member]
Investment Holdings [Line Items]
Total	70,116,000	61,621,000
Level 1 [Member] | Equities [Member]
Investment Holdings [Line Items]
Total	14,679,000	11,949,000
Level 1 [Member] | Mutual Funds [Member]
Investment Holdings [Line Items]
Total	10,341,000	9,595,000
Level 1 [Member] | Exchange Traded Funds [Member]
Investment Holdings [Line Items]
Total	9,545,000	10,344,000
Level 1 [Member] | Corporate Bonds [Member]
Investment Holdings [Line Items]
Total	0
Level 1 [Member] | Government Securities [Member]
Investment Holdings [Line Items]
Total	30,998,000	16,147,000
Level 1 [Member] | Cash and Money Funds [Member]
Investment Holdings [Line Items]
Total	4,553,000	13,586,000
Level 2 [Member]
Investment Holdings [Line Items]
Total	25,229,000	27,877,000
Level 2 [Member] | Equities [Member]
Investment Holdings [Line Items]
Total	0
Level 2 [Member] | Mutual Funds [Member]
Investment Holdings [Line Items]
Total	0
Level 2 [Member] | Exchange Traded Funds [Member]
Investment Holdings [Line Items]
Total	0
Level 2 [Member] | Corporate Bonds [Member]
Investment Holdings [Line Items]
Total	25,229,000	$ 27,877,000
Level 2 [Member] | Government Securities [Member]
Investment Holdings [Line Items]
Total	0
Level 2 [Member] | Cash and Money Funds [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Equities [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Mutual Funds [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Exchange Traded Funds [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Corporate Bonds [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Government Securities [Member]
Investment Holdings [Line Items]
Total	0
Level 3 [Member] | Cash and Money Funds [Member]
Investment Holdings [Line Items]
Total	$ 0

Inventories - Net Inventories (

Inventories - Net Inventories (Detail) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Inventory, Net [Abstract]
Raw materials	$ 27,057,000	$ 14,607,000
Work in process	7,179,000	3,633,000
Finished goods	6,556,000	8,810,000
Used equipment	40,000	40,000
Inventories, net	$ 40,832,000	$ 27,090,000

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($)	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2020
Inventory [Line Items]
Slow moving and obsolete inventory reserve	$ 5,208,000	$ 4,617,000
Raw materials	27,057,000	$ 14,607,000
Blaw Know [Member]
Inventory [Line Items]
Raw materials	$ 10,400,000
Three to Four Years Old Inventory [Member]
Inventory [Line Items]
Cost basis reduction in inventory, percentage	50.00%
Inventory, minimum time period on the shelf, years	3 years
Inventory, maximum time period on the shelf, years	4 years
Four to Five Years Old Inventory [Member]
Inventory [Line Items]
Cost basis reduction in inventory, percentage	75.00%
Inventory, minimum time period on the shelf, years	4 years
Inventory, maximum time period on the shelf, years	5 years
Greater Than Five Years Old Inventory [Member]
Inventory [Line Items]
Inventory, minimum time period on the shelf, years	5 years
Inventory valuation estimate	$ 0

Costs and Estimated Earnings _3

Costs and Estimated Earnings in Excess of Billings and Billings in Excess of Costs and Estimated Earnings - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Detail) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]
Costs incurred on uncompleted contracts	$ 7,975,000	$ 10,390,000
Estimated earnings	3,368,000	4,680,000
Costs and estimated earnings on uncompleted contracts	11,343,000	15,070,000
Billings to date	12,028,000	8,665,000
Costs and estimated earnings in excess of billings	0	6,405,000
Billings in excess of costs and estimated earnings	$ 685,000	$ 0

Earnings per Share Data - Basic

Earnings per Share Data - Basic and Diluted Earnings Per Share (Detail) - USD ($)	3 Months Ended						9 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net Income	$ 2,335,000	$ 2,288,000	$ 1,551,000	$ 4,322,000	$ (655,000)	$ 2,489,000	$ 6,174,000	$ 6,156,000
Common Shares:
Weighted average common shares outstanding	14,617,000			14,601,000			14,613,000	14,592,000
Effect of dilutive stock options	132,000			118,000			129,000	125,000
Diluted shares outstanding	14,749,000			14,719,000			14,742,000	14,717,000
Basic:
Net earnings per share	$ 0.16			$ 0.30			$ 0.42	$ 0.42
Diluted:
Net earnings per share	$ 0.16			$ 0.29			$ 0.42	$ 0.42

Earnings Per Share Data - Addit

Earnings Per Share Data - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Exercisable stock options, included in the diluted earnings per share calculation	252,000	250,000	252,000	257,000
Effect of dilutive stock options	132,000	118,000	129,000	125,000
Inclusive Of Diluted Earning [Member]
Exercisable stock options, included in the diluted earnings per share calculation		7,000
Anti-dilutive shares	0		0

Customers with 10% (or greate_2

Customers with 10% (or greater) of Net Revenues - Additional information (Detail) - Revenue [Member]	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Customer One [Member]
Percentage of concentration	17.50%
Customer Three [Member]
Percentage of concentration		16.50%
Customer Four [Member]
Percentage of concentration		13.30%
Customer Five [Member]
Percentage of concentration		12.60%
No Customer [Member]
Percentage of concentration			10.00%	10.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
IncomeTaxes [Line Items]
Valuation Allowance	$ 0	$ 0

Revenue Recognition and Relat_3

Revenue Recognition and Related Costs - Disaggregation of Company's Net Revenue by Major Source (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenue	$ 24,919,000	$ 22,940,000	$ 65,235,000	$ 66,963,000
Equipment Sales [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net revenue	6,507,000	10,350,000	14,509,000	32,269,000
Equipment Sales [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net revenue	12,258,000	8,995,000	31,959,000	20,946,000
Parts and Component Sales [Member]
Disaggregation of Revenue [Line Items]
Net revenue	5,240,000	2,671,000	16,001,000	10,492,000
Freight Revenue [Member]
Disaggregation of Revenue [Line Items]
Net revenue	996,000	822,000	2,888,000	2,926,000
Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	$ (82,000)	$ 102,000	$ (122,000)	$ 330,000

Revenue Recognition and Relat_4

Revenue Recognition and Related Costs - Additional Information (Detail) - USD ($)	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Amortization period for incremental costs	1 year
Costs and estimated earnings in excess of billings	$ 0	$ 6,405,000
Accounts receivable related to contracts with customers	268,000	223,000
Billings in excess of costs and estimated earnings	685,000	0
Current Liabilities [Member]
Disaggregation of Revenue [Line Items]
Customer deposits related to contracts with customers	3,761,000	3,853,000
Billings in excess of costs and estimated earnings	$ 685,000	$ 0

Leases - Summary of Other Infor

Leases - Summary of Other Information Concerning the Company's Operating Lease (Detail) - USD ($)	Jun. 30, 2021	Oct. 09, 2020	Sep. 30, 2020	Aug. 28, 2020
Lessee, Lease, Description [Line Items]
Operating lease ROU asset included in other long-term assets	$ 254,000			$ 970,000
Current operating lease liability	403,000		$ 328,000
Non-current operating lease liability	491,000		614,000
New Lease Agreement [Member]
Lessee, Lease, Description [Line Items]
Operating lease ROU asset included in other long-term assets		$ 254,000		$ 970,000
Blaw Knox Product Line From Volvo CE [Member] | New Lease Agreement [Member]
Lessee, Lease, Description [Line Items]
Operating lease ROU asset included in other long-term assets	894,000		942,000
Current operating lease liability	403,000		328,000
Non-current operating lease liability	$ 491,000		$ 614,000
Weighted average remaining lease term (in years)	2 years 3 months		2 years 11 months 1 day
Weighted average discount rate used in calculating ROU asset	4.00%		4.00%

Leases - Summary of Future Annu

Leases - Summary of Future Annual Minimum Lease Payments (Detail)	Jun. 30, 2021USD ($)
Minimum Lease Payments, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract]
2021 (remaining 6 months)	$ 116,000
2022	419,000
2023	400,000
Total	935,000
Less interest	(41,000)
Present value of lease liabilities	$ 894,000

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Oct. 09, 2020	Sep. 30, 2020	Aug. 28, 2020
Lessee, Lease, Description [Line Items]
Assets	$ 254,000	$ 254,000			$ 970,000
Operating Lease, Expense	106,000	301,000
Operating lease term					3 years
Operating leases paid in cash	105,000	349,000
New Lease Agreement [Member]
Lessee, Lease, Description [Line Items]
Assets			$ 254,000		$ 970,000
Blaw Knox Product Line From Volvo CE [Member] | New Lease Agreement [Member]
Lessee, Lease, Description [Line Items]
Assets	$ 894,000	$ 894,000		$ 942,000
Operating lease term			1 year

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Jun. 30, 2021Segment
Segment Reporting [Abstract]
Number of repotable segments	1