Summary of Significant Accounting Policies (Policies)	3 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The accompanying unaudited consolidated condensed financial statements include the accounts of SIFCO Industries, Inc. and its wholly-owned subsidiaries (the "Company"). All significant intercompany accounts and transactions have been eliminated in consolidation. The U.S. dollar is the functional currency for all of the Company’s U.S. operations and its non-operating subsidiaries. For these operations, all gains and losses from completed currency transactions are included in income. The functional currency for the Company's other non-U.S. subsidiaries is the Euro. Assets and liabilities are translated into U.S. dollars at the rates of exchange at the end of the period, and revenues and expenses are translated using average rates of exchange for the period. Foreign currency translation adjustments are reported as a component of accumulated other comprehensive loss in the unaudited consolidated condensed financial statements. These unaudited consolidated condensed financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s fiscal 2020 Annual Report on Form 10-K. The year-end consolidated balance sheet data was derived from the audited financial statements and disclosures required by accounting principles generally accepted in the United States ("U.S."). The results of operations for any interim period are not necessarily indicative of the results to be expected for other interim periods or the full year.
Net Income/(Loss) per Share	Net Income/(Loss) per ShareThe Company’s net income and loss per basic share has been computed based on the weighted-average number of common shares outstanding.
Impact of Recently Issued Accounting Standards	Impact of 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" and subsequent updates. ASU 2016-13 changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The new guidance will replace the current incurred loss approach with an expected loss model. The new expected credit loss impairment model will apply to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held-to-maturity debt instruments, net investments in leases, loan commitments and standby letters of credit. Upon initial recognition of the exposure, the expected credit loss model requires entities to estimate the credit losses expected over the life of an exposure (or pool of exposures). The estimate of expected credit losses should consider historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Financial instruments with similar risk characteristics should be grouped together when estimating expected credit losses. ASU 2016-13 does not prescribe a specific method to make the estimate, so its application will require significant judgment. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. However, in November 2019, the FASB issued ASU 2019-10, "Financial Instruments - Credit Loss (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)," which defers the effective date for public filers that are considered smaller reporting companies ("SRC"), as defined by the Securities and Exchange Commission, to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Because SIFCO is considered a SRC, the Company does not need to implement ASU 2016-13 until October 1, 2023. The Company will continue to evaluate the effect of adopting ASU 2016-13 will have on the Company's results within the consolidated condensed statements of operations and financial condition.In December 2019, ASU 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes" was issued to (i) reduce the complexity of the standard by removing certain exceptions to the general principles in Topic 740 and (ii) improve consistency and simplify other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective beginning October 1, 2021. The Company continues to evaluate the effect adopting this ASU will have on the Company's results within the consolidated condensed statements of operations and financial condition.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Dec. 31, 2020

The accompanying unaudited consolidated condensed financial statements include the accounts of SIFCO Industries, Inc. and its wholly-owned subsidiaries (the "Company"). All significant intercompany accounts and transactions have been eliminated in consolidation.

The U.S. dollar is the functional currency for all of the Company’s U.S. operations and its non-operating subsidiaries. For these operations, all gains and losses from completed currency transactions are included in income. The functional currency for the Company's other non-U.S. subsidiaries is the Euro. Assets and liabilities are translated into U.S. dollars at the rates of exchange at the end of the period, and revenues and expenses are translated using average rates of exchange for the period. Foreign currency translation adjustments are reported as a component of accumulated other comprehensive loss in the unaudited consolidated condensed financial statements.

These unaudited consolidated condensed financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s fiscal 2020 Annual Report on Form 10-K. The year-end consolidated balance sheet data was derived from the audited financial statements and disclosures required by accounting principles generally accepted in the United States ("U.S."). The results of operations for any interim period are not necessarily indicative of the results to be expected for other interim periods or the full year.

Net Income/(Loss) per Share

Net Income/(Loss) per ShareThe Company’s net income and loss per basic share has been computed based on the weighted-average number of common shares outstanding.

Impact of Recently Issued Accounting Standards

Impact of 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" and subsequent updates. ASU 2016-13 changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The new guidance will replace the current incurred loss approach with an expected loss model. The new expected credit loss impairment model will apply to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held-to-maturity debt instruments, net investments in leases, loan commitments and standby letters of credit. Upon initial recognition of the exposure, the expected credit loss model requires entities to estimate the credit losses expected over the life of an exposure (or pool of exposures). The estimate of expected credit losses should consider historical information, current information and reasonable and supportable forecasts, including estimates of prepayments. Financial instruments with similar risk characteristics should be grouped together when estimating expected credit losses. ASU 2016-13 does not prescribe a specific method to make the estimate, so its application will require significant judgment. ASU 2016-13 is effective for public companies in fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. However, in November 2019, the FASB issued ASU 2019-10, "Financial Instruments - Credit Loss (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)," which defers the effective date for public filers that are considered smaller reporting companies ("SRC"), as defined by the Securities and Exchange Commission, to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Because SIFCO is considered a SRC, the Company does not need to implement ASU 2016-13 until October 1, 2023. The Company will continue to evaluate the effect of adopting ASU 2016-13 will have on the Company's results within the consolidated condensed statements of operations and financial condition.In December 2019, ASU 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes" was issued to (i) reduce the complexity of the standard by removing certain exceptions to the general principles in Topic 740 and (ii) improve consistency and simplify other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective beginning October 1, 2021. The Company continues to evaluate the effect adopting this ASU will have on the Company's results within the consolidated condensed statements of operations and financial condition.