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COMBINED AND CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues: |  |  |  |  |  |
Retail revenues | [2] | $ 547,283 | [1] | $ 356,659 | [3] | $ 320,558
Net asset optimization revenues | [4] | (586) | [1] | 1,494 | [3] | 2,318
Total Revenues |  | 546,697 | [1] | 358,153 | [3] | 322,876
Operating Expenses: |  |  |  |  |  |
Retail cost of revenues | [5] | 344,944 | [1] | 241,188 | [3] | 258,616
General and administrative | [6] | 84,964 | [1] | 61,682 | [3] | 45,880
Depreciation and amortization | [1] | 32,788 |  | 25,378 |  | 22,221
Total Operating Expenses |  | 462,696 | [1] | 328,248 | [3] | 326,717
Operating income (loss) |  | 84,001 | [1] | 29,905 | [3] | (3,841)
Other (expense)/income: |  |  |  |  |  |
Interest expense |  | (8,859) | [1] | (2,280) | [3] | (1,578)
Interest and other income |  | 957 | [1] | 324 | [3] | 263
Total other expenses |  | (7,902) | [1] | (1,956) | [3] | (1,315)
Income (loss) before income tax expense |  | 76,099 | [1] | 27,949 | [3] | (5,156)
Income tax expense (benefit) |  | 10,426 | [1] | 1,974 | [3] | (891)
Net income (loss) |  | 65,673 | [1],[7],[8] | 25,975 | [3],[9] | (4,265)
Less: Net income (loss) attributable to non-controlling interests |  | 51,229 | [1] | 22,110 | [3] | (4,211)
Net income (loss) attributable to Spark Energy, Inc. stockholders |  | 14,444 | [1] | 3,865 | [3] | (54)
Other comprehensive income (loss): |  |  |  |  |  |
Currency translation gain |  | 41 | [1] | 0 | [3] | 0
Other comprehensive income |  | 41 | [1] | 0 | [3] | 0
Comprehensive income (loss) |  | 65,714 | [1] | 25,975 | [3] | (4,265)
Less: Comprehensive income attributable to non-controlling interests |  | 51,259 | [1] | 22,110 | [3] | (4,211)
Comprehensive income attributable to Spark Energy, Inc. stockholders |  | $ 14,455 | [1] | $ 3,865 | [3] | $ (54)
Net income (loss) attributable to Spark Energy, Inc. per common share |  |  |  |  |  |
Basic (in dollars per share) |  | $ 2.53 | [1] | $ 1.26 | [3] | $ (0.02)
Diluted (in dollars per share) |  | $ 2.23 | [1] | $ 1.06 | [3] | $ (0.02)
Weighted average commons shares outstanding |  |  |  |  |  |
Basic (in shares) |  | 5,701 | [1] | 3,064 | [3] | 3,000
Diluted (in shares) |  | 6,345 | [1] | 3,327 | [3] | 3,000
[1] | Financial information has been recast to include results attributable to the acquisition of Major Energy Companies by an affiliate on April 15, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.
[2] | Retail revenues includes retail revenues—affiliates of $0, $0 and $2,170 for the years ended December 31, 2016, 2015 and 2014, respectively.
[3] | (2) Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC from an affiliate on May 12, 2015. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions", respectively, for further discussion.
[4] | Net asset optimization revenues includes asset optimization (expense)/revenues—affiliates of $154, $1,101 and $12,842 for the years ended December 31, 2016, 2015 and 2014, respectively, and asset optimization revenues—affiliates cost of revenues of $1,633, $11,285 and $30,910 for the years ended December 31, 2016, 2015 and 2014, respectively.
[5] | Retail cost of revenues includes retail cost of revenues—affiliates of $9, $17 and $13 for the years December 31, 2016, 2015 and 2014, respectively.
[6] | General and administrative includes general and administrative expense—affiliates of $15,700, $0 and less than $100 for the years ended December 31, 2016, 2015 and 2014, respectively.
[7] | Financial information has been recast to include results attributable to the acquisition of Major Energy Companies by an affiliate on April 15, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.
[8] | Financial information has been recast to include results attributable to the acquisition of the Major Energy Companies from an affiliate on August 23, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.
[9] | Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC by an affiliate on May 12, 2015. See Notes 2 "Basis of Presentation and Summary of Significant Accounting Policies" for further discussion.

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