Basis of Presentation	3 Months Ended
Basis of Presentation	Dec. 31, 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 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, 2021 are not necessarily indicative of the results that may be expected for the year ending September 30, 2022. The accompanying Condensed Consolidated Balance Sheet at September 30, 2021 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 CE. The acquisition provided 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 December 31, 2021 and September 30, 2021, and for the quarters ended December 31, 2021 and 2020, include the assets, liabilities and operating results of the paver line as of and for the periods then ended. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the audited consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended September 30, 2021 filed with the Securities and Exchange Commission on December 17, 2021. Recent Accounting Pronouncements 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 this Quarterly Report, 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, 2021 and as of the date this Quarterly Report is 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 continues to monitor the situation on the Company’s financial condition, operations, suppliers, industry, customers, and workforce. As the spread of COVID-19 and its variants 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 and its variants. 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.