|
Summary of Warrant Activity (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | 0 Months Ended | |
|---|---|---|---|
|
Dec. 31, 2013
|
Jun. 03, 2013
First Issuance
|
Nov. 15, 2013
Second Issuance
|
|
| Class of Warrant or Right [Line Items] | |||
| Value of warrants issued | $ 17,597 | $ 4,392 | $ 13,205 |
| Changes in fair value, net | (2,026) | (175) | (1,851) |
| Value of warrants exercised | (500) | (500) | |
| Value of warrants at December 31, 2013 | $ 15,071 | $ 3,717 | $ 11,354 |
| Number of warrants outstanding | 6,670,103 | 1,655,000 | 5,015,000 |