| Shareholder Report | 6 Months Ended | 120 Months Ended |
| May 31, 2024 USD ($) Holding | May 31, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | SPIRIT OF AMERICA INVESTMENT FUND INC | |
| Entity Central Index Key | 0001039667 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | May 31, 2024 | |
| C000143747 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Spirit of America Energy Fund | |
| Class Name | Class A Shares | |
| Trading Symbol | SOAEX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Energy Fund for the period of December 1, 2023 to May 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.funddocs.filepoint.com/soa | |
| Additional Information Phone Number | (516) 390-5565 | |
| Additional Information Website | www.funddocs.filepoint.com/soa</span>/" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.funddocs.filepoint.com/soa</span>/ | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A Shares $74 1.47% | |
| Expenses Paid, Amount | $ 74 | |
| Expense Ratio, Percent | 1.47% | |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception (July 10, 2014) Spirit of America Energy Fund - Class A Shares Without Load 34.63% 7.90% - With Load 26.92% 6.63% - S&P 500 ® 28.19% 15.80% 12.57% | |
| Performance Inception Date | | Jul. 10, 2014 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |
| Material Change Date | May 31, 2024 | |
| AssetsNet | $ 211,212,400 | $ 211,212,400 |
| Holdings Count | Holding | 73 | 73 |
| Advisory Fees Paid, Amount | $ 1,052,503 | |
| InvestmentCompanyPortfolioTurnover | 11% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $211,212,400 Number of Portfolio Holdings 73 Advisory Fee $1,052,503 Portfolio Turnover 11% | |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Liabilities in Excess of Other Assets -6.1% Power Generation 0.1% Gas Utilities 0.3% Integrated Electric Utilities 0.4% Diversified Industrials 0.4% Oilfield Services & Equipment 3.3% Money Market 6.4% Integrated Oils 12.5% Exploration & Production 15.1% Refining & Marketing 20.7% Midstream - Oil & Gas 46.9% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the period ended May 31, 2024. | |
| C000167220 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Spirit of America Energy Fund | |
| Class Name | Class C Shares | |
| Trading Symbol | SACEX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Energy Fund for the period of December 1, 2023 to May 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.funddocs.filepoint.com/soa | |
| Additional Information Phone Number | (516) 390-5565 | |
| Additional Information Website | www.funddocs.filepoint.com/soa</span>/" id="sjs-B44"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.funddocs.filepoint.com/soa</span>/ | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C Shares $111 2.22% | |
| Expenses Paid, Amount | $ 111 | |
| Expense Ratio, Percent | 2.22% | |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception (March 15, 2016) Spirit of America Energy Fund - Class C Shares Without Load 33.68% 7.11% 5.56% With Load 32.68% 7.11% 5.56% S&P 500 ® 28.19% 15.80% 14.47% | |
| Performance Inception Date | | Mar. 15, 2016 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |
| Material Change Date | May 31, 2024 | |
| AssetsNet | $ 211,212,400 | $ 211,212,400 |
| Holdings Count | Holding | 73 | 73 |
| Advisory Fees Paid, Amount | $ 1,052,503 | |
| InvestmentCompanyPortfolioTurnover | 11% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $211,212,400 Number of Portfolio Holdings 73 Advisory Fee $1,052,503 Portfolio Turnover 11% | |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Liabilities in Excess of Other Assets -6.1% Power Generation 0.1% Gas Utilities 0.3% Integrated Electric Utilities 0.4% Diversified Industrials 0.4% Oilfield Services & Equipment 3.3% Money Market 6.4% Integrated Oils 12.5% Exploration & Production 15.1% Refining & Marketing 20.7% Midstream - Oil & Gas 46.9% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the period ended May 31, 2024. | |
| C000218733 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Spirit of America Energy Fund | |
| Class Name | Institutional Shares | |
| Trading Symbol | SAIEX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Energy Fund for the period of December 1, 2023 to May 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.funddocs.filepoint.com/soa | |
| Additional Information Phone Number | (516) 390-5565 | |
| Additional Information Website | www.funddocs.filepoint.com/soa</span>/" id="sjs-B69"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.funddocs.filepoint.com/soa</span>/ | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Shares $61 1.22% | |
| Expenses Paid, Amount | $ 61 | |
| Expense Ratio, Percent | 1.22% | |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |
| Material Change Date | May 31, 2024 | |
| AssetsNet | $ 211,212,400 | $ 211,212,400 |
| Holdings Count | Holding | 73 | 73 |
| Advisory Fees Paid, Amount | $ 1,052,503 | |
| InvestmentCompanyPortfolioTurnover | 11% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $211,212,400 Number of Portfolio Holdings 73 Advisory Fee $1,052,503 Portfolio Turnover 11% | |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Liabilities in Excess of Other Assets -6.1% Power Generation 0.1% Gas Utilities 0.3% Integrated Electric Utilities 0.4% Diversified Industrials 0.4% Oilfield Services & Equipment 3.3% Money Market 6.4% Integrated Oils 12.5% Exploration & Production 15.1% Refining & Marketing 20.7% Midstream - Oil & Gas 46.9% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the period ended May 31, 2024. | |
