XML 57 R42.htm IDEA: XBRL DOCUMENT v3.6.0.2

Formation and Organization - Tax Receivable Agreement (Details) - $ / shares		12 Months Ended
	Aug. 01, 2014	Dec. 31, 2016
NuDevco Retail Holdings | Common Class B
Class of Stock [Line Items]
Common stock, shares to be issued	10,612,500
NuDevco Retail Holdings and NuDevco Retail
Class of Stock [Line Items]
Tax receivable agreement, target dividend (in dollars per share)		$ 0.3625
Tax receivable agreement, coverage percentage		130.00%

X

- Definition

Initial Public Offering, Shares, to be Issued

+ References

No definition available.

+ Details

Name:	spke_InitialPublicOfferingSharesToBeIssued
Namespace Prefix:	spke_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Related Party Transaction, Tax Receivable Agreement, Coverage Percentage

+ References

No definition available.

+ Details

Name:	spke_RelatedPartyTransactionTaxReceivableAgreementCoveragePercentage
Namespace Prefix:	spke_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Related Party Transaction, Tax Receivable Agreement, Per Share, Target Dividend Amount

+ References

No definition available.

+ Details

Name:	spke_RelatedPartyTransactionTaxReceivableAgreementPerShareTargetDividendAmount
Namespace Prefix:	spke_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=spke_NuDevcoRetailHoldingsandNuDevcoRetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: