Basis of Presentation	3 Months Ended
Basis of Presentation	Dec. 31, 2020
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 and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all material adjustments (consisting of normal, recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the quarter ended December 31, 2020 are not necessarily indicative of the results that may be expected for the year ending September 30, 2021. 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 product 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 is subject to post-closing adjustments, was funded by cash on hand. The initial accounting for the business combination included $11.0 million in inventory and $3.4 million in fixed assets. Due to COVID-19 constraints, the Company is in the process of finalizing the post-closing adjustments. There were no liabilities assumed. The accompanying condensed consolidated financial statements as of December 31, 2020, include the assets, liabilities and operating results of Blaw-Knox for the quarter then ended. There were no revenues generated by Blaw-Knox during the quarter ended December 31, 2020, as the facility is being readied to begin production. 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 (Topic 842) (“ASU 2016-02”). With adoption of this standard, lessees are required to recognize most leases as a right-of-use asset and a lease liability on their balance sheet. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. ASU 2016-02 must be applied on a modified retrospective basis and was effective for fiscal years beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Company adopted ASU 2016-02 in the first quarter of fiscal 2020. The initial adoption of ASU 2016-02 did not have a significant impact on its consolidated financial statements. During the fourth quarter of fiscal 2020, the Company entered into a three-year operating lease for property related to the manufacturing and warehousing of the Blaw-Knox paver product line which resulted in reporting a right-of-use (“ROU”) asset and related lease liabilities of approximately $970,000. On October 9, 2020, the Company entered into a second operating lease for additional warehousing space for the Blaw-Knox inventory. The lease term is for one year beginning November 2020 with automatic one-year renewals. In accordance with ASU 2016-02, the Company recorded a ROU asset totaling $254,000 and related lease liabilities at inception (see Note 9 – Leases). In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement—Disclosure Framework (Topic 820) (ASU 2018-13). The updated guidance improves the disclosure requirements on fair value measurements, including, among other things, addition of certain disclosures related to level 3 fair value measurements, and removal of disclosure requirements for (i) the amount and reasons for transfers between level 1 and level 2 of the fair value hierarchy, and (ii) policy and timing of transfers between fair value hierarchy levels. The updated guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company adopted ASU 2018-13 for the quarter ended December 31, 2020. The application of this guidance did not have a material effect on our disclosures. 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 The Company continues to monitor and evaluate the risks to public health and the slowdown in overall business activity related to the COVID-19 pandemic, including impacts on its employees, customers, suppliers and financial results. As of the date of issuance of these Condensed Consolidated Financial Statements, the Company’s operations have not been significantly impacted. However, the full impact of the COVID-19 pandemic continues to evolve subsequent to the quarter ended December 31, 2020 and as of the date these Condensed Consolidated Financial Statements are issued. As such, the full magnitude that the COVID-19 pandemic will have on the Company’s financial condition and future results of operations is uncertain. Management is actively monitoring the situation on the Company’s financial condition, operations, suppliers, industry, customers, and workforce. As the spread of COVID-19 continues, the Company’s ability to meet customer demands for products may be impacted or its customers may experience adverse business consequences due to COVID-19. Reduced demand for products or ability to meet customer demand (including as a result of disruptions at the Company’s suppliers) could have a material adverse effect on its business operations and financial performance.