Basis of Presentation	9 Months Ended
Basis of Presentation	Jun. 30, 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 and nine months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending September 30, 2020. The accompanying Condensed Consolidated Balance Sheet at September 30, 2019 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. 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, 2019. Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), amending its accounting guidance related to revenue recognition. Under this ASU and subsequently issued amendments, revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures are required to provide the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The standard is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. The Company adopted ASU 2014-09 in the first quarter of fiscal 2019. The Company elected to adopt the standard using the modified retrospective method. The adoption of ASU 2014-09 did not have a significant impact on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). With adoption of this standard, lessees must 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. Classification is based on criteria that are similar to those applied in prior lease accounting. ASU 2016-02 must be applied on a modified retrospective basis and is 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 adoption of ASU 2016-02 did not have a significant impact on its consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017-09”). The new guidance clarifies when a change to the terms or conditions of a share based payment award must be accounted for as a modification. ASU 2017-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017, with early adoption permitted. The Company adopted ASU 2017-09 in the first quarter of fiscal 2019. The adoption of ASU 2017-09 did not have a significant impact on its consolidated financial statements. 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 our employees, customers, suppliers and financial results. As of the date of issuance of these unaudited Condensed Consolidated Financial Statements, our operations have not been significantly impacted. However, the full impact of the COVID-19 pandemic continues to evolve subsequent to the quarter and nine months ended June 30, 2020 and as of the date these unaudited Condensed Consolidated Financial Statements are issued. As such, the full magnitude that the COVID-19 pandemic will have on our financial condition and future results of operations is uncertain. Management is actively monitoring the situation on our financial condition, operations, suppliers, industry, customers, and workforce. As the spread of COVID-19 continues, our ability to meet customer demands for products may be impacted or our 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 our suppliers and vendors) could have a material adverse effect on our business operations and financial performance.