| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 |
|---|---|---|---|---|---|---|
Operating expenses: | ||||||
Research and development | ||||||
18,057 | 22,416 | 17,314 | 22,101 | 15,004 | 8,868 | 9,133 |
General and administrative | ||||||
9,809 | 8,707 | 9,249 | 11,430 | 10,060 | 8,067 | 10,163 |
Total operating expenses | ||||||
27,866 | 31,124 | 26,563 | 33,532 | 25,065 | 16,935 | 19,296 |
Loss from operations | ||||||
-27,866 | -31,124 | -26,563 | -33,532 | -25,065 | -16,935 | -19,296 |
Other income: | ||||||
Interest income | ||||||
359 | 672 | 418 | 216 | 75 | -12,412 | - |
Other expense | ||||||
- | - | -905 | -1,569 | - | - | - |
Refundable state tax credits | ||||||
- | - | - | - | - | 424 | - |
Change in fair value of warrant and embedded derivative liabilities | ||||||
- | - | - | - | 131 | 1,225 | 2,612 |
Interest income | ||||||
- | - | - | - | - | - | -1,712 |
Change in fair value of warrant liabilities | ||||||
-14,712 | 7,232 | -11,532 | -6,346 | - | - | - |
Total other income | ||||||
15,071 | -6,559 | 11,046 | 4,993 | -55 | -13,213 | -4,324 |
Net (loss) income | ||||||
-12,794 | -37,684 | -15,517 | -28,538 | -25,120 | -30,149 | -23,620 |
Preferred stock dividend in-kind | ||||||
- | - | - | - | - | 4,468 | - |
Net loss attributable to common stockholders | ||||||
- | - | - | - | - | -34,617 | -23,620 |
Per share information: | ||||||
Net (loss) income per share of common stock, basic and diluted | ||||||
-1.54 | -4.95 | -2.79 | -0.85 | -1.08 | -3.86 | -23.35 |
Basic and diluted weighted average shares outstanding | ||||||
8,283 | 7,606 | 5,559 | 33,539 | 23,328 | 8,973 | 1,011 |