|
Property and equipment (Details) (USD $)
|
12 Months Ended |
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Property and equipment |
|
|
|
| Property and equipment, gross |
$ 3,686,000 |
$ 1,144,000 |
|
| Less: accumulated depreciation |
(861,000) |
(513,000) |
|
| Property and equipment, net |
2,825,000 |
631,000 |
|
| Depreciation expenses |
427,000 |
236,000 |
207,000 |
| Laboratory equipment |
|
|
|
| Property and equipment |
|
|
|
| Property and equipment, gross |
1,040,000 |
1,035,000 |
|
| Computer equipment |
|
|
|
| Property and equipment |
|
|
|
| Property and equipment, gross |
225,000 |
27,000 |
|
| Furniture |
|
|
|
| Property and equipment |
|
|
|
| Property and equipment, gross |
325,000 |
44,000 |
|
| Leasehold Improvements |
|
|
|
| Property and equipment |
|
|
|
| Property and equipment, gross |
$ 2,096,000 |
$ 38,000 |
|