The following table provides a reconciliation of Non-GAAP net (loss) income and Non-GAAP net (loss) income per share - diluted to net (loss) income and net (loss) income per share – diluted, the most comparable GAAP financial measures:
| (Unaudited) | ||||||||||||||||
| Three Months Ended June 30, | Six Months Ended June 30, | |||||||||||||||
| (in thousands, except per share amounts) | 2020 | 2019 | 2020 | 2019 | ||||||||||||
| Net (loss) income | $ | (10,223 | ) | $ | (3,120 | ) | $ | (4,193 | ) | $ | 9,899 | |||||
| Stock-based compensation expense | 4,534 | 2,080 | 7,705 | 3,292 | ||||||||||||
| Amortization of intangible assets | 3,692 | 3,600 | 7,532 | 7,128 | ||||||||||||
| Special adjustments (1) | 578 | 776 | 578 | 1,004 | ||||||||||||
| Income tax effect of non-GAAP adjustments | (280 | ) | (175 | ) | (662 | ) | (415 | ) | ||||||||
| Non-GAAP net (loss) income | $ | (1,699 | ) | $ | 3,161 | $ | 10,960 | $ | 20,908 | |||||||
| Net (loss) income per share - diluted | $ | (0.14 | ) | $ | (0.04 | ) | $ | (0.06 | ) | $ | 0.13 | |||||
| Non-GAAP net (loss) income per share - diluted | $ | (0.02 | ) | $ | 0.04 | $ | 0.14 | $ | 0.27 | |||||||
| GAAP diluted shares outstanding: | 72,999 | 71,373 | 72,811 | 77,017 | ||||||||||||
| Non-GAAP diluted shares outstanding: | 80,700 | 77,700 | 80,700 | 77,700 | ||||||||||||
(1) Includes $0.6 million of severance expense for the three and six months ended June 30, 2020. Includes $0.8 million and $1.0 million of impairment charges for royalty contracts for the three and six months ended June 30, 2019, respectively.
