| Schedule of quarterly financial data |
| | | | | | | | | | | | | | | Three months ended | | | | December 31, | | | September 30, | | | June 30, | | | March 31, | | | | (in thousands, except per share data) | | 2019 | | | | | | | | | | | | | Operating results: | | | | | | | | | | | | | Total revenues | $ | 83,240 | | $ | 77,909 | | $ | 74,355 | | $ | 66,824 | | Cost of product revenues | | 39,479 | | | 40,138 | | | 41,382 | | | 41,605 | | Cost of licensing and other revenues | | 4,983 | | | 3,742 | | | 2,443 | | | 1,698 | | Gross profit | | 38,778 | | | 34,029 | | | 30,530 | | | 23,521 | | Operating expenses | | 73,589 | | | 55,123 | | | 59,166 | | | 55,267 | | Interest expense and other (expense) income, net | | (386) | | | (1,999) | | | (1,885) | | | (2,271) | | Income tax expense | | 14 | | | (44) | | | (1,895) | | | (74) | | Net loss | $ | (35,183) | | $ | (23,137) | | $ | (32,416) | | $ | (34,091) | | Per share data: | | | | | | | | | | | | | Net loss - basic | $ | (0.46) | | $ | (0.33) | | $ | (0.48) | | $ | (0.54) | | Net loss - diluted | $ | (0.46) | | $ | (0.33) | | $ | (0.48) | | $ | (0.54) | | | | | | | | | | | | | | | 2018 | | | | | | | | | | | | | Operating results: | | | | | | | | | | | | | Total revenues | $ | 66,965 | | $ | 65,280 | | $ | 63,069 | | $ | 62,340 | | Cost of product revenues | | 40,345 | | | 39,477 | | | 39,204 | | | 39,055 | | Cost of licensing and other revenues | | 2,444 | | | 2,202 | | | 1,791 | | | 1,537 | | Gross profit | | 24,176 | | | 23,601 | | | 22,074 | | | 21,748 | | Operating expenses | | 53,903 | | | 50,767 | | | 49,292 | | | 52,265 | | Interest expense and other (expense) income, net | | (2,128) | | | (2,332) | | | (6,493) | | | (2,252) | | Income tax expense | | 14 | | | (118) | | | (113) | | | (104) | | Net loss | $ | (31,841) | | $ | (29,616) | | $ | (33,824) | | $ | (32,873) | | Per share data: | | | | | | | | | | | | | Net loss - basic | $ | (0.51) | | $ | (0.49) | | $ | (0.62) | | $ | (0.61) | | Net loss - diluted | $ | (0.51) | | $ | (0.49) | | $ | (0.62) | | $ | (0.61) | |
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