| Document and Entity Information | Sep. 22, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001690012 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Sep. 22, 2021 |
| Entity Registrant Name | INPOINT COMMERCIAL REAL ESTATE INCOME, INC. |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 000-55782 |
| Entity Tax Identification Number | 32-0506267 |
| Entity Address, Address Line One | 2901 Butterfield Road Oak |
| Entity Address, City or Town | Brook |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60523 |
| City Area Code | (800) |
| Local Phone Number | 826-8228 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | 6.75% Series A Cumulative Redeemable Preferred Stock, par value $0.001 per share |
| Trading Symbol | ICR PR A |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
