Warrants - Additional Information (Detail) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2013 |
|
| Class of Warrant or Right [Line Items] | ||
| Issuance of common stock shares | 8,896,848 | 301,778 |
| Weighted average exercise price of warrants | $ 0.99 | |
| Weighted average remaining life of warrants | 4 years | |
| Number of shares purchased for warrants exercised | 4,598,129 | |
| Net proceeds from warrants exercised | $ 4,398,000 | |
| Number of warrants issued | 0 | |
| Number of warrants cancelled | 0 | |
| Warrant Agreement [Member] | ||
| Class of Warrant or Right [Line Items] | ||
| Issuance of common stock shares | 176,145 | |
| Number of shares purchased for warrants exercised | 215,000 |
| X | ||||||||||
- Definition Class of warrant or right cancelled. No definition available.
|
| X | ||||||||||
- Definition Class of warrant or right issued. No definition available.
|
| X | ||||||||||
- Definition Exercise of warrants to purchase common stock shares during the period. No definition available.
|
| X | ||||||||||
- Definition Warrants Weighted Average Exercise Price No definition available.
|
| X | ||||||||||
- Definition Warrants weighted average remaining contractual term. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. No definition available.
|
| X | ||||||||||
- Details
|