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