| Years Ended December 31, | Three Months Ended March 31, 2018 | ||||||||||||||
| 2015 | 2016 | 2017 | |||||||||||||
| (dollars in thousands) | |||||||||||||||
| Net Loss Before Taxes | $ | (52,023 | ) | $ | (40,969 | ) | $ | (52,078 | ) | $ | (14,388 | ) | |||
| Add: | |||||||||||||||
| Fixed Charges | 287 | 311 | 333 | 99 | |||||||||||
| Total Earnings | $ | (51,736 | ) | $ | (40,658 | ) | $ | (51,745 | ) | $ | (14,289 | ) | |||
| Fixed Charges Calculation: | |||||||||||||||
| Interest expensed and capitalized | $ | — | $ | — | $ | — | $ | — | |||||||
| Amortized premiums, discounts, and capitalized expenses related to indebtedness | — | — | — | — | |||||||||||
| Interest factor in rents (1) | 287 | 311 | 333 | 99 | |||||||||||
| Total Fixed Charges | $ | 287 | $ | 311 | $ | 333 | $ | 99 | |||||||
| Ratio of Earnings to Fixed Charges | — | — | — | — | |||||||||||
| Deficiency of earnings available to cover fixed charges | $ | (52,023 | ) | $ | (40,969 | ) | $ | (52,078 | ) | $ | (14,388 | ) | |||
| (1) | Consists of one-third of rental expense, which we believe to be a reasonable estimate of an interest factor in our leases. |
