XML 92 R9999.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Label	Element	Value
Temporary Equity, Accretion to Redemption Value, Adjustment	us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment	$ 86,801,000
Temporary Equity, Stock Issued During Period, Value, Acquisitions	npwr_TemporaryEquityStockIssuedDuringPeriodValueAcquisitions	109,639,000
Temporary Equity, Shares Issued, Value, Share-Based Payment Arrangement, Forfeited	npwr_TemporaryEquitySharesIssuedValueShareBasedPaymentArrangementForfeited	752,000
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	357,019,000
Temporary Equity, Net Income	us-gaap_TemporaryEquityNetIncome	(75,585,000)
Former NET Power, LLC. [Member]
Temporary Equity, Stock Issued During Period, Value, New Issues	us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues	1,676,618,000
NET Power, Inc. [Member]
Temporary Equity, Value, Conversion Of Convertible Securities	npwr_TemporaryEquityValueConversionOfConvertibleSecurities	(50,241,000)
RONI [Member]
Reclassifications of Temporary to Permanent Equity	us-gaap_ReclassificationsOfTemporaryToPermanentEquity	(218,983,000)
Common Class A [Member] | NET Power, Inc. [Member]
Temporary Equity, Value, Conversion Of Convertible Securities	npwr_TemporaryEquityValueConversionOfConvertibleSecurities	(137,335,000)
Common Class A [Member] | RONI [Member]
Reclassifications of Temporary to Permanent Equity	us-gaap_ReclassificationsOfTemporaryToPermanentEquity	$ (218,983,000)

X

- Definition

Temporary Equity, Shares Issued, Value, Share-Based Payment Arrangement, Forfeited

+ References

No definition available.

+ Details

Name:	npwr_TemporaryEquitySharesIssuedValueShareBasedPaymentArrangementForfeited
Namespace Prefix:	npwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Temporary Equity, Stock Issued During Period, Value, Acquisitions

+ References

No definition available.

+ Details

Name:	npwr_TemporaryEquityStockIssuedDuringPeriodValueAcquisitions
Namespace Prefix:	npwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Temporary Equity, Value, Conversion Of Convertible Securities

+ References

No definition available.

+ Details

Name:	npwr_TemporaryEquityValueConversionOfConvertibleSecurities
Namespace Prefix:	npwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-24

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-4

+ Details

Name:	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The difference between the carrying amount of a financial instrument subject to a registration payment arrangement recorded as temporary equity prior to adoption of FSP EITF 00-19-2 and the carrying amount reclassified to permanent equity upon the adoption of FSP EITF 00-19-2. Recorded as a cumulative effect adjustment to the beginning balance of retained earnings. Does not apply to registration payment arrangements that are no longer outstanding upon adoption of FSP EITF 00-19-2.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-3

+ Details

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

X

- Definition

Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The portion of net income or loss attributable to temporary equity interest.

+ References

No definition available.

+ Details

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

X

- Definition

Value of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_CounterpartyNameAxis=npwr_FormerNETPowerLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=npwr_NETPowerIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=npwr_RONIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: