Computation of Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic (loss) earnings per share attributable to The New Home Company Inc. (in dollars per share)	$ 0.03	$ (0.06)	$ 0.30	$ 0.03
Diluted (loss) earnings per share attributable to The New Home Company Inc. (in dollars per share)	$ 0.03	$ (0.06)	$ 0.30	$ 0.03
Numerator:
Net income (loss) attributable to The New Home Company Inc.	$ 449,350	$ (1,045,355)	$ 5,017,996	$ 525,856
Denominator:
Basic weighted-average shares outstanding	16,516,546	16,448,750	16,502,578	15,233,473
Stock options and unvested restricted stock units	156,103	0	121,085	22,278
Diluted weighted-average shares outstanding	16,672,649	16,448,750	16,623,663	15,255,751
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock options and unvested restricted stock units not included in diluted earnings (loss) per share	787	904,224	396	723,218