|
Consolidated Statements of Comprehensive Loss (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Net loss | $ (53,305,938) | $ (23,921,563) | $ (10,471,330) |
| Other comprehensive loss: | |||
| Foreign currency translation (loss) gain | (10,382) | (8,264) | (180,049) |
| Unrealized (loss) on short-term investments | (11,928) | ||
| Total comprehensive loss | $ (53,328,248) | $ (23,929,827) | $ (10,651,379) |