v3.21.2

Note 8 - Accrued Expenses and Other Liabilities (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Standard Product Warranty Accrual, Estimated Recoveries From Insurance Policies	$ 3.0	$ 3.0	$ 2.5
Estimated Litigation Liability	7.1	7.1
Increase (Decrease) in Litigation Reserve		0.4
The Epic Acquisition [Member]
Standard Product Warranty Accrual, Additions from Business Acquisition		0.2
Home Building Segment [Member]
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	0.4	0.6
Construction Defect Claims [Member]
Estimated Litigation Liability			5.6
Claim Specific Litigation Reserve [Member]
Estimated Litigation Liability			1.0
IBNR Construction Defect Claims [Member]
Estimated Litigation Liability	$ 1.1	$ 1.1	$ 4.6

The increase (decrease) during the period in the carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

No definition available.

+ Details

Name:	nwhm_IncreaseDecreaseInLitigationReserve
Namespace Prefix:	nwhm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is estimated to be recovered by insurance policies.

+ References

No definition available.

+ Details

Name:	nwhm_StandardProductWarrantyAccrualEstimatedRecoveriesFromInsurancePolicies
Namespace Prefix:	nwhm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase in the standard product warranty accrual from a business acquisition. Excludes extended product warranties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) in the standard product warranty accrual from changes in estimates attributable to preexisting product warranties. Excludes extended product warranties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(4))
-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

New Home Co Inc. 10-Q