|
Significant accounting policies (Details 4) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2014
item
|
|
| Property and equipment | |
| Impairment losses on long-lived assets | $ 0 |
| Concentrations of credit risk and off-balance sheet risk | |
| Number of financial institutions in which cash, cash equivalents and investments were deposited | 2 |
| Significant off-balance sheet concentrations of credit risk | 0.00% |
| Laboratory equipment | |
| Property and equipment | |
| Estimated useful lives | 5 years |
| Furniture | |
| Property and equipment | |
| Estimated useful lives | 5 years |
| Computer equipment | |
| Property and equipment | |
| Estimated useful lives | 3 years |