| Dec'19 | Dec'18 | Dec'17 | Dec'16 | |||
|---|---|---|---|---|---|---|
Revenues | ||||||
- | - | 0 | 0 | |||
Cost and expenses: | ||||||
Depreciation | ||||||
13 | 5 | 3 | 0 | |||
Research and development | ||||||
1,967 | 971 | 289 | 354 | |||
General and administrative | ||||||
8,702 | 11,386 | 3,019 | 3,776 | |||
Total costs and expenses | ||||||
10,682 | 12,363 | 3,312 | 4,132 | |||
Operating loss | ||||||
-10,682 | -12,363 | -3,312 | -4,132 | |||
Interest income | ||||||
27 | 29 | 0 | 0 | |||
Interest expense | ||||||
- | 37 | 1 | 0 | |||
Other expense | ||||||
- | - | -1 | 0 | |||
Net loss | ||||||
-10,654 | -12,372 | -3,314 | -4,132 | |||
Net loss per share—basic and diluted (in dollars per share) | ||||||
-0.66 | -0.90 | -0.29 | -0.38 | |||
Weighted average number of common shares— basic and diluted (in shares) | ||||||
16,026 | 13,771 | 11,500 | 10,834 | |||