Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Revenues:
Home sales	$ 187,258		$ 119,874		$ 117,460		$ 79,437		$ 279,885	$ 114,622	$ 96,929	$ 69,406	$ 504,029		$ 560,842	$ 507,949
Fee building, including management fees from unconsolidated joint ventures of $3,385, $4,945 and $8,202, respectively	42,408		39,240		38,095		43,794		44,217	43,309	47,181	55,617	163,537		190,324	186,507
Revenues													667,566		751,166	694,456
Cost of Sales:
Home sales	162,034		102,124		102,678		69,694		234,668	95,992	82,488	60,065	436,530		473,213	433,559
Home sales impairments	10,000		0		0		0		900	0	1,300	0	10,000		2,200	2,350
Land sale impairment													0		0	1,150
Fee building	41,275		38,124		37,038		42,699		43,194	41,808	45,899	53,926	159,136		184,827	178,103
Cost of Sales													605,666		660,240	615,162
Gross Margin:
Gross Profit Home Sales	15,224		17,750		14,782		9,743		44,317	18,630	13,141	9,341	57,499		85,429	72,040
Gross Profit Land Sales													0		0	(1,150)
Gross Profit Fee Building	1,133		1,116		1,057		1,095		1,023	1,501	1,282	1,691	4,401		5,497	8,404
Gross Margin													61,900		90,926	79,294
Expenses:
Selling and marketing expenses													(36,065)		(32,702)	(26,744)
General and administrative expenses													(25,966)		(26,330)	(25,882)
Equity in net income (loss) of unconsolidated joint ventures													(19,653)		866	7,691
Other income (expense), net													(521)		(229)	(409)
Pretax income (loss)	(22,376)		3,400		182		(1,511)		21,692	6,974	2,505	1,360	(20,305)		32,531	33,950
(Provision) benefit for income taxes													6,075		(15,390)	(13,024)
Net income (loss)													(14,230)		17,141	20,926
Net loss attributable to non-controlling interest													14		11	96
Net income (loss) attributable to The New Home Company Inc.	$ (16,150)		$ 2,459		$ 115		$ (640)		$ 10,471	$ 4,318	$ 1,517	$ 846	$ (14,216)		$ 17,152	$ 21,022
Earnings (loss) per share attributable to The New Home Company Inc.:
Earnings Per Share, Basic	$ (0.80)	[1]	$ 0.12	[1]	$ 0.01	[1]	$ (0.03)	[1]	$ 0.50	$ 0.21	$ 0.07	$ 0.04	$ (0.69)	[1]	$ 0.82	$ 1.02
Earnings Per Share, Diluted	$ (0.80)		$ 0.12	[1]	$ 0.01	[1]	$ (0.03)	[1]	$ 0.50	$ 0.21	$ 0.07	$ 0.04	$ (0.69)	[1]	$ 0.82	$ 1.01
Weighted average number of shares outstanding
Basic (in shares)													20,703,967		20,849,736	20,685,386
Diluted (in shares)													20,703,967		20,995,498	20,791,445

[1] (1)Some amounts do not add to our full year results presented on our consolidated statement of operations due to rounding differences in quarterly and annual weighted average share calculations