Year Ended December 31, | Three Months Ended March 31, 2018 | ||||||||||||||||||
2014 | 2015 | 2016 | 2017 | ||||||||||||||||
(in thousands) | |||||||||||||||||||
Earnings: | |||||||||||||||||||
Loss before income taxes | $ | (25,036 | ) | $ | (30,236 | ) | $ | (22,526 | ) | $ | (15,002 | ) | $ | (36,439 | ) | ||||
Interest expense | - | - | - | - | - | ||||||||||||||
Assumed interest component of rental expense | 953 | 1,382 | 1,937 | 2,611 | 623 | ||||||||||||||
Total earnings available for fixed charges | $ | (24,083 | ) | $ | (28,854 | ) | $ | (20,589 | ) | $ | (12,391 | ) | $ | (35,816 | ) | ||||
Fixed Charges: | |||||||||||||||||||
Interest expense | |||||||||||||||||||
Assumed interest component of rental expense | 953 | 1,382 | 1,937 | 2,611 | 623 | ||||||||||||||
Total fixed charges | $ | 953 | $ | 1,382 | $ | 1,937 | $ | 2,611 | $ | 623 |