The following table presents details of stock-based compensation expense included in each functional line item in the condensed consolidated statements of operations above:
| Three Months Ended July 31, | Six Months Ended July 31, | |||||||||||||||
| 2016 | 2015 | 2016 | 2015 | |||||||||||||
| (unaudited, in thousands) | ||||||||||||||||
| Stock-based compensation: | ||||||||||||||||
| Cost of revenue | $ | 246 | $ | 127 | $ | 491 | $ | 251 | ||||||||
| Research and development | 6,873 | 3,671 | 13,592 | 6,765 | ||||||||||||
| Selling, general and administrative | 4,347 | 2,323 | 8,684 | 4,587 | ||||||||||||
| Total stock-based compensation | $ | 11,466 | $ | 6,121 | $ | 22,767 | $ | 11,603 | ||||||||
| AMBARELLA, INC. | |||||||||||||||
| RECONCILIATION OF GAAP TO NON-GAAP DILUTED EARNINGS PER SHARE | |||||||||||||||
| (in thousands, except share and per share data) | |||||||||||||||
| Three Months Ended July 31, | Six Months Ended July 31, | ||||||||||||||
| 2016 | 2015 | 2016 | 2015 | ||||||||||||
| (unaudited) | |||||||||||||||
| GAAP net income | $ | 8,632 | $ | 23,097 | $ | 10,415 | $ | 41,951 | |||||||
| Non-GAAP adjustments: | |||||||||||||||
| Stock-based compensation expense | 11,466 | 6,121 | 22,767 | 11,603 | |||||||||||
| Acquisition cost | — | 1,229 | — | 1,229 | |||||||||||
| Income tax effect | (1,592 | ) | (750 | ) | (3,238 | ) | (1,425 | ) | |||||||
| Non-GAAP net income | $ | 18,506 | $ | 29,697 | $ | 29,944 | $ | 53,358 | |||||||
| GAAP - diluted weighted average shares | 34,175,466 | 33,904,222 | 34,063,103 | 33,688,239 | |||||||||||
| Non-GAAP - diluted weighted average shares | 34,175,466 | 33,904,222 | 34,063,103 | 33,688,239 | |||||||||||
| GAAP - diluted net income per share | $ | 0.25 | $ | 0.68 | $ | 0.31 | $ | 1.25 | |||||||
| Non-GAAP adjustments: | |||||||||||||||
| Stock-based compensation expense | 0.34 | 0.18 | 0.67 | 0.34 | |||||||||||
| Acquisition cost | — | 0.04 | — | 0.03 | |||||||||||
| Income tax effect | (0.05 | ) | (0.02 | ) | (0.10 | ) | (0.04 | ) | |||||||
| Non-GAAP - diluted net income per share | $ | 0.54 | $ | 0.88 | $ | 0.88 | $ | 1.58 | |||||||
