Computation of Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net income attributable to The New Home Company Inc.	$ 2,509	$ 449	$ 1,695	$ 5,018
Denominator:
Basic weighted-average shares outstanding	20,709,139	16,516,546	20,654,998	16,502,578
Stock options and unvested restricted stock units	51,047	156,103	90,804	121,085
Diluted weighted-average shares outstanding	20,760,186	16,672,649	20,745,802	16,623,663
Basic earnings per share attributable to The New Home Company Inc.	$ 0.12	$ 0.03	$ 0.08	$ 0.30
Diluted earnings per share attributable to The New Home Company Inc.	$ 0.12	$ 0.03	$ 0.08	$ 0.30
Antidilutive stock options and unvested restricted stock units not included in diluted earnings per share	888,953	787	867,272	396