Exhibit 12.1
CALCULATION OF CONSOLIDATED RATIOS OF EARNINGS TO FIXED CHARGES
(dollars in thousands)
| Six Months Ended 6/30/2018 | Years Ended December 31, | |||||||||||||||||||||||
| 2017 | 2016 | 2015 | 2014 | 2013 | ||||||||||||||||||||
Fixed Charges: | ||||||||||||||||||||||||
Interest expense | $ | — | $ | — | $ | — | $ | — | $ | — | $ | — | ||||||||||||
Interest expense on portion of rent expense representative of interest | 32 | 75 | 66 | 39 | 177 | 177 | ||||||||||||||||||
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Total Fixed Charges | $ | 32 | $ | 75 | $ | 66 | $ | 39 | $ | 177 | $ | 177 | ||||||||||||
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Earnings (loss): | ||||||||||||||||||||||||
Income (loss) from operations | $ | (17,422 | ) | $ | (23,008 | ) | $ | (18,169 | ) | $ | (12,891 | ) | $ | (16,034 | ) | $ | 3,285 | |||||||
Fixed charges per above | 32 | 75 | 66 | 39 | 177 | 177 | ||||||||||||||||||
Total earnings (loss) as adjusted | (17,390 | ) | (22,933 | ) | (18,103 | ) | (12,852 | ) | (15,857 | ) | 3,462 | |||||||||||||
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Ratio of earnings to fixed charges | N/A | N/A | N/A | N/A | N/A | $ | 19.6 | |||||||||||||||||
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Deficiency of earnings available to cover fixed charges | $ | (17,390 | ) | (22,933 | ) | (18,103 | ) | (12,852 | ) | (15,857 | ) | N/A | ||||||||||||
