|
Outstanding Warrants to Purchase Shares of Common Stock (Detail)
|
9 Months Ended |
|
Sep. 30, 2012
|
| Class of Warrant or Right [Line Items] |
|
| Warrants Issued |
10,804,695 |
| Weighted Average Exercise Price |
0.99 |
| Exercised |
5,000 |
| Warrants Outstanding |
10,799,695 |
|
Period Issuance01
|
|
| Class of Warrant or Right [Line Items] |
|
| Grant Date |
Jul. 15,
2009 |
| Warrants Issued |
2,909,695 |
| Weighted Average Exercise Price |
1.64 |
| Expiration Date |
Jul. 14,
2014 |
| Exercised |
5,000 |
| Warrants Outstanding |
2,904,695 |
|
Period Issuance01 | Minimum
|
|
| Class of Warrant or Right [Line Items] |
|
| Exercise Price Range |
1.25 |
|
Period Issuance01 | Maximum
|
|
| Class of Warrant or Right [Line Items] |
|
| Exercise Price Range |
2.28 |
|
Period Issuance02
|
|
| Class of Warrant or Right [Line Items] |
|
| Grant Date |
Apr. 21,
2010 |
| Warrants Issued |
2,632,500 |
| Exercise Price Range |
0.94 |
| Weighted Average Exercise Price |
0.94 |
| Expiration Date |
Apr. 20,
2015 |
| Exercised |
0 |
| Warrants Outstanding |
2,632,500 |
|
Period Issuance03
|
|
| Class of Warrant or Right [Line Items] |
|
| Grant Date |
Jun. 20,
2011 |
| Warrants Issued |
2,750,000 |
| Exercise Price Range |
0.60 |
| Weighted Average Exercise Price |
0.60 |
| Expiration Date |
Jun. 19,
2016 |
| Exercised |
0 |
| Warrants Outstanding |
2,750,000 |
|
Period Issuance04
|
|
| Class of Warrant or Right [Line Items] |
|
| Grant Date |
Apr.
04,
2012 |
| Warrants Issued |
2,512,500 |
| Exercise Price Range |
0.50 |
| Weighted Average Exercise Price |
0.50 |
| Expiration Date |
Apr.
03,
2017 |
| Exercised |
0 |
| Warrants Outstanding |
2,512,500 |