|
SELECTED QUARTERLY FINANCIAL DATA (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2012
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| SELECTED QUARTERLY FINANCIAL DATA | |||||||||||
| Revenue | $ 5,750 | $ 1,400 | $ 1,500 | $ 750 | $ 7,150 | $ 2,250 | $ 4,750 | ||||
| Net loss | $ (16,861) | $ (23,824) | $ (22,768) | $ (25,574) | $ (25,472) | $ (25,456) | $ (24,738) | $ (23,174) | $ (89,027) | $ (98,840) | $ (85,973) |
| Net loss per share, basic and diluted (in dollars per share) | $ (0.19) | $ (0.27) | $ (0.26) | $ (0.29) | $ (0.30) | $ (0.36) | $ (0.35) | $ (0.32) | $ (1.02) | $ (1.32) | $ (1.36) |
| Weighted average shares used in computing net loss per share, basic and diluted (in shares) | 87,430 | 87,430 | 87,147 | 87,141 | 85,274 | 71,636 | 71,458 | 71,422 | 87,288 | 74,967 | 63,329 |