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Earnings (Loss) Per Share | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings Per Share Basic earnings per share is calculated by dividing the net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated by dividing the earnings by the weighted average number of common shares and potentially dilutive securities outstanding during the period. Potentially dilutive common shares consist of incremental common shares issuable upon exercise of stock options, employee stock purchases, restricted stock and restricted stock units and shares issuable upon the conversion of convertible notes. The dilutive effect of outstanding shares is reflected in diluted earnings per share by application of the treasury stock method. This method includes consideration of the amounts to be paid by the employees and the amount of unrecognized stock-based compensation related to future services. No potential dilutive common shares are included in the computation of any diluted per share amount when a net loss is reported. The following table sets forth the computation of basic and diluted net income per share:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Net income per share: | (In thousands, except per share amounts)
Numerator: |  |  |  |  |  |  |  |  |
Net income | $ | 2,605 |  |  | $ | 3,876 |  |  | $ | 5,611 |  |  | $ | 5,754 |
Denominator: |  |  |  |  |  |  |
Weighted-average shares outstanding - basic | 110,060 |  |  | 109,904 |  |  | 110,758 |  |  | 109,818 |
Effect of potential dilutive common shares | 2,505 |  |  | 2,157 |  |  | 3,333 |  |  | 2,384 |
Weighted-average shares outstanding - diluted | 112,565 |  |  | 112,061 |  |  | 114,091 |  |  | 112,202 |
Basic net income per share | $ | 0.02 |  |  | $ | 0.04 |  |  | $ | 0.05 |  |  | $ | 0.05 |
Diluted net income per share | $ | 0.02 |  |  | $ | 0.03 |  |  | $ | 0.05 |  |  | $ | 0.05 |
For the three months ended June 30, 2017 and 2016, options to purchase approximately 2.0 million and 2.3 million shares, respectively, and for the six months ended June 30, 2017 and 2016, options to purchase approximately 2.0 million and 2.3 million shares, respectively, were excluded from the calculation because they were anti-dilutive after considering proceeds from exercise and related unrecognized stock-based compensation expense.

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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 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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