XML 56 R46.htm IDEA: XBRL DOCUMENT v3.22.2

Commitment and Contingencies (Details)	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Maximum reimbursement for development cost reimbursement agreement	$ 57,000,000
Letters of credit	$ 15,000,000
Minimum maintainable amount of demand deposit account, percent	105.00%
Utah Associated Municipal Power Systems
Loss Contingencies [Line Items]
Net development costs	$ 13,024,000

X

- Definition

Accrued Development Costs, Net

+ References

No definition available.

+ Details

Name:	smr_AccruedDevelopmentCostsNet
Namespace Prefix:	smr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Demand Deposit Accounts, Amount Maintained, Minimum, Percentage Of Aggregate Amount Available To Be Drawn Under Letters Of Credit Outstanding

+ References

No definition available.

+ Details

Name:	smr_DemandDepositAccountsAmountMaintainedMinimumPercentageOfAggregateAmountAvailableToBeDrawnUnderLettersOfCreditOutstanding
Namespace Prefix:	smr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248

+ Details

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

X

- Details

Name:	dei_LegalEntityAxis=smr_UtahAssociatedMunicipalPowerSystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: