Shareholder Report |
6 Months Ended |
|---|---|
|
Jun. 30, 2026
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 | Jun. 30, 2026 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| C000073513 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Income Fund |
| Class Name | Class A Shares |
| Trading Symbol | SOAIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Income Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 57 |
| Expense Ratio, Percent | 1.14% |
| AssetsNet | $ 40,563,438 |
| Holdings Count | Holding | 106 |
| Advisory Fees Paid, Amount | $ 77,641 |
| InvestmentCompanyPortfolioTurnover | 1.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| Material Fund Change [Text Block] | |
| C000167229 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Income Fund |
| Class Name | Class C Shares |
| Trading Symbol | SACTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Income Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 94 |
| Expense Ratio, Percent | 1.89% |
| AssetsNet | $ 40,563,438 |
| Holdings Count | Holding | 106 |
| Advisory Fees Paid, Amount | $ 77,641 |
| InvestmentCompanyPortfolioTurnover | 1.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| Material Fund Change [Text Block] | |
| C000219380 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Income Fund |
| Class Name | Institutional Shares |
| Trading Symbol | SOITX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Income Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.89% |
| AssetsNet | $ 40,563,438 |
| Holdings Count | Holding | 106 |
| Advisory Fees Paid, Amount | $ 77,641 |
| InvestmentCompanyPortfolioTurnover | 1.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| Material Fund Change [Text Block] | |
| C000003857 | |
| Shareholder Report [Line Items] | |
| Class Name | Class A Shares |
| Trading Symbol | SOAVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Large Cap Value Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 80 |
| Expense Ratio, Percent | 1.52% |
| AssetsNet | $ 240,444,108 |
| Holdings Count | Holding | 146 |
| Advisory Fees Paid, Amount | $ 1,068,497 |
| InvestmentCompanyPortfolioTurnover | 4.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000167227 | |
| Shareholder Report [Line Items] | |
| Class Name | Class C Shares |
| Trading Symbol | SACVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Large Cap Value Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 117 |
| Expense Ratio, Percent | 2.22% |
| AssetsNet | $ 240,444,108 |
| Holdings Count | Holding | 146 |
| Advisory Fees Paid, Amount | $ 1,068,497 |
| InvestmentCompanyPortfolioTurnover | 4.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000219378 | |
| Shareholder Report [Line Items] | |
| Class Name | Institutional Shares |
| Trading Symbol | SOIVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Large Cap Value Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 65 |
| Expense Ratio, Percent | 1.22% |
| AssetsNet | $ 240,444,108 |
| Holdings Count | Holding | 146 |
| Advisory Fees Paid, Amount | $ 1,068,497 |
| InvestmentCompanyPortfolioTurnover | 4.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000059931 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Municipal Tax Free Bond Fund |
| Class Name | Class A Shares |
| Trading Symbol | SOAMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Municipal Tax Free Bond Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.91% |
| AssetsNet | $ 22,644,140 |
| Holdings Count | Holding | 102 |
| Advisory Fees Paid, Amount | $ 3,823 |
| InvestmentCompanyPortfolioTurnover | 10.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000167228 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Municipal Tax Free Bond Fund |
| Class Name | Class C Shares |
| Trading Symbol | SACFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Municipal Tax Free Bond Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 88 |
| Expense Ratio, Percent | 1.76% |
| AssetsNet | $ 22,644,140 |
| Holdings Count | Holding | 102 |
| Advisory Fees Paid, Amount | $ 3,823 |
| InvestmentCompanyPortfolioTurnover | 10.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000219379 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Municipal Tax Free Bond Fund |
| Class Name | Institutional Shares |
| Trading Symbol | SOIMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Municipal Tax Free Bond Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 39 |
| Expense Ratio, Percent | 0.76% |
| AssetsNet | $ 22,644,140 |
| Holdings Count | Holding | 102 |
| Advisory Fees Paid, Amount | $ 3,823 |
| InvestmentCompanyPortfolioTurnover | 10.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000003855 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Real Estate Income and Growth Fund |
| Class Name | Class A Shares |
| Trading Symbol | SOAAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Real Estate Income and Growth Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 87 |
| Expense Ratio, Percent | 1.62% |
| AssetsNet | $ 74,694,909 |
| Holdings Count | Holding | 93 |
| Advisory Fees Paid, Amount | $ 341,331 |
| InvestmentCompanyPortfolioTurnover | 8.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000167226 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Real Estate Income and Growth Fund |
| Class Name | Class C Shares |
| Trading Symbol | SACRX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Real Estate Income and Growth Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 124 |
| Expense Ratio, Percent | 2.32% |
| AssetsNet | $ 74,694,909 |
| Holdings Count | Holding | 93 |
| Advisory Fees Paid, Amount | $ 341,331 |
| InvestmentCompanyPortfolioTurnover | 8.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000219377 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Real Estate Income and Growth Fund |
| Class Name | Institutional Shares |
| Trading Symbol | SOIAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Real Estate Income and Growth Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 71 |
| Expense Ratio, Percent | 1.32% |
| AssetsNet | $ 74,694,909 |
| Holdings Count | Holding | 93 |
| Advisory Fees Paid, Amount | $ 341,331 |
| InvestmentCompanyPortfolioTurnover | 8.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000240591 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Utilities Fund |
| Class Name | Class A Shares |
| Trading Symbol | SOAUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Utilities Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 79 |
| Expense Ratio, Percent | 1.53% |
| AssetsNet | $ 59,192,118 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 260,958 |
| InvestmentCompanyPortfolioTurnover | 0.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000240590 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Utilities Fund |
| Class Name | Class C Shares |
| Trading Symbol | SOCUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Utilities Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 117 |
| Expense Ratio, Percent | 2.28% |
| AssetsNet | $ 59,192,118 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 260,958 |
| InvestmentCompanyPortfolioTurnover | 0.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] | |
| C000240589 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spirit of America Utilities Fund |
| Class Name | Institutional Shares |
| Trading Symbol | SOIUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spirit of America Utilities Fund (the "Fund") for the period of January 1, 2026 through June 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at funddocs.filepoint.com/soa/. You can also request this information by contacting us at (516) 390-5565. |
| Additional Information Phone Number | (516) 390-5565 |
| Additional Information Website | funddocs.filepoint.com/soa/ |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 66 |
| Expense Ratio, Percent | 1.28% |
| AssetsNet | $ 59,192,118 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 260,958 |
| InvestmentCompanyPortfolioTurnover | 0.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] |