|
Net Loss Per Common Share - Reconciliation of Numerator and Denominator (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Numerator: | ||
| Net loss - basic | $ (11,154) | $ (7,109) |
| Less: noncash income from change in fair value of common stock warrants | 1,757 | |
| Net loss - diluted | $ (11,154) | $ (8,866) |
| Denominator: | ||
| Weighted average common shares outstanding | 66,732 | 59,303 |
| Dilutive effect of warrants | 0 | 1,997 |
| Weighted-average common shares outstanding and dilutive potential common shares — diluted | 66,732 | 61,300 |
| Net loss per share | ||
| Basic | $ (0.17) | $ (0.12) |
| Diluted | $ (0.17) | $ (0.14) |