Quarterly Financial Information (Unaudited) (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
|
|
Quarterly Financial Information Disclosure [Abstract] | |||||||||||
Revenues | $ 167 | $ 171 | $ 167 | $ 171 | $ 575 | $ 944 | $ 735 | $ 404 | $ 676 | $ 2,658 | $ 507 |
Operating expenses | 10,869 | 9,737 | 11,359 | 9,138 | 12,795 | 9,612 | 10,446 | 11,215 | 41,103 | 44,068 | 29,751 |
Net loss | $ (11,054) | $ (9,689) | $ (11,302) | $ (8,951) | $ (12,221) | $ (8,668) | $ (9,711) | $ (10,811) | $ (40,996) | $ (41,411) | $ (29,670) |
Basic and diluted net loss per share (in dollars per share) | $ (0.52) | $ (0.55) | $ (0.64) | $ (0.51) | $ (0.82) | $ (0.60) | $ (0.67) | $ (0.75) | $ (2.20) | $ (2.84) | $ (2.05) |