| Document And Entity Information | Apr. 30, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | The New Home Company Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Apr. 30, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-36283 |
| Entity, Tax Identification Number | 27-0560089 |
| Entity, Address, Address Line One | 6730 N Scottsdale Rd., Suite 290 |
| Entity, Address, City or Town | Scottsdale |
| Entity, Address, State or Province | AZ |
| Entity, Address, Postal Zip Code | 85253 |
| City Area Code | 602 |
| Local Phone Number | 767-1426 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | NWHM |
| Security Exchange Name | NYSE |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001574596 |
