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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Other Comprehensive Income / Loss | Noncontrolling Interest | Total
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, shares at Dec. 31, 2013 | 927,000 | 16,126,000 |  |  |  |  |
Beginning balance, value at Dec. 31, 2013 | $ 1 | $ 16 | $ 6,921,557 | $ (532,356) | $ 0 | $ 5,683 | $ 94,901
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations and tax, shares |  | 90,000 |  |  |  |  |
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations, value |  |  | 1,890 |  |  |  | 1,890
Issuance of common stock, shares |  | 1,750,000 |  |  |  |  |
Issuance of common stock, value |  | $ 2 | 26,071 |  |  |  | 26,073
Warrant exercises, shares issued |  | 6,413,000 |  |  |  |  |
Warrant exercises, value |  | $ 6 | 85,156 |  |  |  | 85,162
Shares issued as payment of prior unpaid Series B preferred dividends, shares |  | 120,000 |  |  |  |  |
Shares issued as payment of prior unpaid Series B preferred dividends, value |  | $ 1 | 1,462 |  |  |  | 1,463
Pension plan adjustment |  |  |  |  |  |  | 0
Purchases of interests in PE Op Co. |  |  | (79) |  |  | (5,921) | (6,000)
Tax impact of purchases of interests in PE Op Co. |  |  | (10,244) |  |  |  | (10,244)
Preferred stock dividends |  |  |  | (1,265) |  |  | (1,265)
Net income (loss) |  |  |  | 21,289 |  | 4,713 | 26,002
Ending balance, shares at Dec. 31, 2014 | 927,000 | 24,499,000 |  |  |  |  |
Ending balance, value at Dec. 31, 2014 | $ 1 | $ 25 | 725,813 | (512,332) | 0 | 4,475 | 217,982
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations and tax, shares |  | 216,000 |  |  |  |  |
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations, value |  |  | 1,475 |  |  |  | 1,475
Warrant exercises, shares issued |  | 42,000 |  |  |  |  |
Warrant exercises, value |  |  | 440 |  |  |  | 440
Aventine acquisition, shares issued |  | 17,758,000 |  |  |  |  |
Aventine acquisition, value |  | $ 18 | 174,555 |  |  |  | 174,573
Pension plan adjustment |  |  |  |  | 1,040 |  | 1,040
Purchases of interests in PE Op Co. |  |  | 560 |  |  | (4,388) | (3,828)
Preferred stock dividends |  |  |  | (1,265) |  |  | (1,265)
Net income (loss) |  |  |  | (18,786) |  | (87) | (18,873)
Ending balance, shares at Dec. 31, 2015 | 927,000 | 42,515,000 |  |  |  |  |
Ending balance, value at Dec. 31, 2015 | $ 1 | $ 43 | 902,843 | (532,383) | 1,040 | 0 | 371,544
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations and tax, shares |  | 659,000 |  |  |  |  |
Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations, value |  | $ 1 | 2,281 |  |  |  | 2,282
Warrant exercises, shares issued |  | 138,000 |  |  |  |  |
Warrant exercises, value |  |  | 1,338 |  |  |  | 1,338
ACEC contribution to form Pacific Aurora |  |  | 5,761 |  |  | 10,739 | 16,500
Sale of Pacific Aurora interests to ACEC |  |  | 10,475 |  |  | 19,525 | 30,000
Pension plan adjustment |  |  |  |  | (3,660) |  | (3,660)
Preferred stock dividends |  |  |  | (1,269) |  |  | (1,269)
Net income (loss) |  |  |  | 1,419 |  | 107 | 1,526
Ending balance, shares at Dec. 31, 2016 | 927,000 | 43,312,000 |  |  |  |  |
Ending balance, value at Dec. 31, 2016 | $ 1 | $ 44 | $ 922,698 | $ (532,233) | $ (2,620) | $ 30,371 | $ 418,261

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