| Document And Entity Information - USD ($) | Dec. 31, 2020 | Mar. 22, 2021 | Jun. 30, 2020 |
| Document Information [Line Items] | |||
| Entity, Registrant Name | The New Home Company Inc. | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document, Fiscal Period Focus | FY | ||
| Document, Fiscal Year Focus | 2020 | ||
| Document, Type | 10-K/A | ||
| Document, Annual Report | true | ||
| Document, Period End Date | Dec. 31, 2020 | ||
| Document, Transition Report | false | ||
| Entity, File Number | 001-36283 | ||
| Entity, Incorporation, State or Country Code | DE | ||
| 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 | ||
| Entity, Well-known Seasoned Issuer | No | ||
| Entity, Voluntary Filers | No | ||
| Entity, Current Reporting Status | Yes | ||
| Entity, Interactive Data, Current | Yes | ||
| Entity, Filer Category | Non-accelerated Filer | ||
| Entity, Small Business | true | ||
| Entity, Emerging Growth Company | false | ||
| Entity, Shell Company | false | ||
| Entity, Public Float | $ 46,031,980 | ||
| Entity, Common Stock Shares, Outstanding | 18,109,101 | ||
| Documents Incorporated By Reference Text Block | The information required by Part III of this Report, to the extent not set forth herein, is incorporated herein by reference from the registrant’s definitive proxy statement relating to the Annual Meeting of Stockholders to be held in 2021, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates. | ||
| Amendment Description | This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends the Annual Report on Form 10-K of The New Home Company Inc. (the “Company,” “we” or “our”) for the year ended December 31, 2020, originally filed with the U.S. Securities and Exchange Commission (“SEC”) on February 11, 2021 (the “Original Filing”). We are filing this Amendment solely to disclose an update to the location of the Company’s principal executive offices which are now located at 6730 N Scottsdale Rd., Suite 290, Scottsdale, AZ 85253 (“Principal Executive Offices Move”). The Company is restating Item 1 solely to reflect the Principal Executive Offices Move in Item 1 under the caption “Our Offices and Available Information”. In addition, pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), currently dated certifications (the “Certifications”) from the Company’s principal executive officer and principal financial officer are filed herewith as exhibits to this Amendment pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of SEC Regulation S-K, paragraphs 3, 4, and 5 of such certifications have been omitted. Similarly, because no financial statements have been included in this Amendment, currently dated certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 have been omitted. This Amendment consists solely of the preceding cover page, this explanatory note, Item 1, the exhibit index, the Certifications, and the signature page. Except as expressly noted in this Form 10-K/A, this Form 10-K/A does not reflect events occurring after the date of the Original Filing of the Form 10-K or modify or update any of the other disclosures contained in the Original Filing including, without limitation, the financial statements. Accordingly, this Form 10-K/A should be read in conjunction with the Company’s Original Filing. Capitalized terms used herein, but not defined, shall have the meaning ascribed in the Company’s Original Filing. | ||
| Amendment Flag | true | ||
| Entity, Central Index Key | 0001574596 | ||
| CommonStock Custom [Member] | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Common Stock | ||
| Trading Symbol | NWHM | ||
| Security Exchange Name | NYSE | ||
| SeriesAJuniorParticipatingPreferredShareRepurchaseRights Custom [Member] | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Series A Junior Participating Preferred Share Repurchase Rights | ||
| Trading Symbol | -- | ||
| Security Exchange Name | NYSE |
