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Unaudited Condensed Consolidated Statement of Equity - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Non-controlling Interests
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2015 | $ 294,009 | $ 6 | $ (17,869) | $ 273,451 | $ (1,237) | $ 39,300 | $ 358
Beginning balance (in shares) at Dec. 31, 2015 |  | 56,220,000 | 1,785,000 |  |  |  |
Increase (Decrease) in Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) income | (35,211) |  |  |  |  | (35,211) |
Foreign currency translation adjustment | 256 |  |  |  | 256 |  |
Sale of common stock, net of issuance cost | $ 29,940 |  |  | 29,940 |  |  |
Issued in sale of common stock (in shares) | 2,450,339 | 2,450,000 |  |  |  |  |
Stock issued under employee stock purchase plan | $ 670 |  |  | 670 |  |  |
Stock issued in payment of stock purchase plan (in shares) |  |  | (73,000) |  |  |  |
Stock options exercised | $ 184 |  |  | 184 |  |  |
Stock options exercised (in shares) | 114,112 | 114,000 |  |  |  |  |
Stock surrendered for exercise of stock options | $ (50) |  | $ (50) |  |  |  |
Stock surrendered for exercise of stock options (in shares) |  |  | 3,000 |  |  |  |
Restricted stock granted (in shares) | 572,240 | 573,000 |  |  |  |  |
Restricted stock forfeited (in shares) |  |  | 89,000 |  |  |  |
Treasury stock purchased | $ (925) |  | $ (925) |  |  |  |
Treasury stock purchased (in shares) |  |  | 90,000 |  |  |  |
Stock compensation expense | 9,461 |  |  | 9,461 |  |  |
Reduction in tax benefit related to share-based awards | (883) |  |  | (883) |  |  |
Stock issued in IPI acquisition | $ 3,268 |  |  | 3,268 |  |  |
Issued to purchase IPI (in shares) | 247,764 | 248,000 |  |  |  |  |
Ending balance at Sep. 30, 2016 | $ 300,719 | $ 6 | $ (18,844) | $ 316,091 | $ (981) | $ 4,089 | $ 358
Ending balance (in shares) at Sep. 30, 2016 |  | 59,605,000 | 1,894,000 |  |  |  |

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