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NET INCOME PER SHARE | 6 Months Ended
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Jun. 30, 2017
NET INCOME PER SHARE |
NET INCOME PER SHARE | 9. NET INCOME PER SHARE For the three and six months ended June 30, 2017 and 2016, outstanding stock options were the only potentially dilutive securities. The reconciliation from basic to diluted weighted average shares of common stock outstanding is as follows (in thousands):
|  | Three months ended June 30, |  | Six months ended June 30, |
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |
Basic weighted-average shares of common stock outstanding |  | 16,195 |  | 16,145 |  | 16,176 |  | 16,118 |
Stock options |  | 79 |  | — |  | 87 |  | 103 |
Diluted weighted-average shares of common stock outstanding |  | 16,274 |  | 16,145 |  | 16,263 |  | 16,221 |
The above calculation for the three and six months ended June 30, 2017 and 2016, does not include approximately 5,000 shares related to certain stock options because the effect of such options were anti-dilutive.

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