XML 64 R34.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Formation and Organization (Details) $ / shares in Units, customer in Thousands |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 01, 2014 USD ($) $ / shares shares | Sep. 30, 2015 USD ($) vote state customer $ / shares | Sep. 30, 2014 USD ($) | Jul. 31, 2015 state $ / shares | Jul. 08, 2015 $ / shares | May. 04, 2015 | Dec. 31, 2014 $ / shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percent of stock offered | 21.82% |  |  |  |  |  |  |
Net proceeds from the offering | $ | $ 47,600,000 | $ 0 | [1] | $ (47,554,000) |  |  |  |
Payment of note payable to NuDevco | $ |  | 0 | [1] | 50,000 |  |  |  |
Offering costs | $ | $ 2,700,000 | $ 0 | [1] | $ 2,667,000 |  |  |  |
Conversion of stock exchange ratio |  | 1 |  |  |  |  |  |
Oasis Power Holdings |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of customers | customer |  | 43 |  |  |  |  |  |
Number of states in which company operates | state |  | 6 |  |  | 6 |  |  |
CenStar |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of customers | customer |  | 16 |  |  |  |  |  |
Number of states in which company operates | state |  | 3 |  |  |  |  |  |
Common Class A |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 3,000,000 |  |  |  |  |  |  |
Common stock, par value | $ / shares |  | $ 0.01 |  |  |  |  |  | $ 0.01
Percent of stock offered | 21.82% |  |  |  |  |  |  |
Common stock voting rights | vote |  | 1 |  |  |  |  |  |
Common Class B |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 10,750,000 |  |  |  |  |  |  |
Common stock, par value | $ / shares | $ 0.01 | $ 0.01 |  |  | $ 0.01 | $ 0.01 |  | $ 0.01
Percent of stock offered | 78.18% |  |  |  |  |  |  |
Common stock voting rights | vote |  | 1 |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 13,750,000 |  |  |  |  |  |  |
Percent of stock offered | 100.00% |  |  |  |  |  |  |
IPO | Common Class A |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 3,000,000 |  |  |  |  |  |  |
Common stock, par value | $ / shares | $ 0.01 |  |  |  |  |  |  |
Common stock, price per share (usd per share) | $ / shares | $ 18.00 |  |  |  |  |  |  |
Spark HoldCo |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage |  | 22.37% |  |  |  |  | 21.82% |
NuDevco Retail | Common Class B |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 137,500 |  |  |  |  |  |  |
NuDevco Retail Holdings | Common Class B |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares | 10,612,500 |  |  |  |  |  |  |
NuDevco Retail | Spark HoldCo |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage |  | 1.00% |  |  |  |  |  |
NuDevco Retail Holdings | Spark Energy, Inc |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percent of stock offered | 21.82% |  |  |  |  |  |  |
Payment of note payable to NuDevco | $ | $ 50,000 |  |  |  |  |  |  |
NuDevco Retail Holdings | Spark Energy, Inc | Common Class A |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percent of stock offered | 21.82% |  |  |  |  |  |  |
[1] | Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC on May 12, 2015 from an affiliate. See Note 2 “Basis of Presentation” and Note 3 "Acquisitions" for further discussion.

X
- Definition Common Stock, Voting Right + References No definition available. + Details
Name: | spke_CommonStockVotingRight
Namespace Prefix: | spke_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Conversion of Stock, Exchange Ratio + References No definition available. + Details
Name: | spke_ConversionofStockExchangeRatio
Namespace Prefix: | spke_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Initial Public Offering, Percentage of Stock Offered + References No definition available. + Details
Name: | spke_InitialPublicOfferingPercentageOfStockOffered
Namespace Prefix: | spke_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Customers + References No definition available. + Details
Name: | spke_NumberofCustomers
Namespace Prefix: | spke_
Data Type: | xbrli:integerItemType
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
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_RepaymentsOfRelatedPartyDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=spke_OasisPowerHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=spke_CenStarMember
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: |

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=spke_SparkHoldCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=spke_NuDevcoRetailMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=spke_NuDevcoRetailHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=spke_NuDevcoRetailMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=spke_NuDevcoRetailHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=spke_SparkEnergyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |