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Net Income (Loss) Per Common Share | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Net Income (Loss) Per Common Share | 14. Net Income (Loss) Per Common Share The following tables summarize the components of the basic and diluted net income (loss) per common share computations (in thousands except par value and per share data):
| Three Months Ended |  |  | Nine Months Ended |
| September 30, |  |  | September 30, |
| 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Basic EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) (numerator) | $ | (32,886 | ) |  | $ | 126,520 |  |  | $ | (84,549 | ) |  | $ | 71,690 |
Weighted average common shares (denominator) |  | 104,703 |  |  |  | 95,627 |  |  |  | 100,136 |  |  |  | 90,838 |
Net income (loss) per share | $ | (0.31 | ) |  | $ | 1.32 |  |  | $ | (0.84 | ) |  | $ | 0.79 |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) (numerator) | $ | (32,886 | ) |  | $ | 126,520 |  |  | $ | (84,549 | ) |  | $ | 71,690 |
Weighted average common shares |  | 104,703 |  |  |  | 95,627 |  |  |  | 100,136 |  |  |  | 90,838 |
Effect of dilutive securities - common shares issuable |  | — |  |  |  | 921 |  |  |  | — |  |  |  | 36 |
Adjusted weighted average common shares (denominator) |  | 104,703 |  |  |  | 96,549 |  |  |  | 100,136 |  |  |  | 90,873 |
Net income (loss) per share | $ | (0.31 | ) |  | $ | 1.31 |  |  | $ | (0.84 | ) |  | $ | 0.79 |
As further discussed in Note 11 – Commitments and Contingencies, on September 29, 2017, the Company entered into exchange agreements with four holders of the 9.7 million outstanding warrants pursuant to which the Company agreed to issue to such holders and aggregate of 1,292,510 shares of the Company’s common stock on October 3, 2017. The Company has included the 1,292,510 shares of common stock in basic net income (loss) per common share because as of the balance sheet date, all conditions necessary to issue those shares had been satisfied. Common shares issuable represents incremental shares of common stock which consist of stock options, restricted stock units, warrants, and shares that could be issued upon conversion of the senior convertible notes. The computation of basic and diluted net loss per share for the three and nine months ended September 30, 2017 and 2016 excludes the common stock equivalents of the following potentially dilutive securities because their inclusion would be anti-dilutive:
|  | Three months ended September 30, |  | Nine months ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Restricted stock units |  |  | 1,147,688 |  |  |  | 172,953 |  |  |  | 1,147,688 |  |  |  | 172,953 |
Senior convertible notes |  |  | 814,561 |  |  |  | -- |  |  |  | 814,561 |  |  |  | 814,561 |
Warrants |  |  | 31,856 |  |  |  | 9,740,597 |  |  |  | 31,856 |  |  |  | 9,740,597 |
Employee stock purchase plan |  |  | 142,888 |  |  |  | 14,079 |  |  |  | 142,888 |  |  |  | 14,079 |
Stock options |  |  | 7,183,837 |  |  |  | 5,689,486 |  |  |  | 7,183,837 |  |  |  | 5,689,486 |
|  |  | 9,320,830 |  |  |  | 15,617,115 |  |  |  | 9,320,830 |  |  |  | 16,431,676 |
For the three months ended September 30, 2016, the senior convertible notes were dilutive and therefore not included in the excluded potentially dilutive securities table above.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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