|
Fair value per share and aggregate (Detail) (USD $)
|
Sep. 30, 2012
|
Jun. 30, 2012
|
|---|---|---|
| Accounting Policies [Line Items] | ||
| Issued Warrants | 2,859,060 | 2,400,328 |
|
June 2012 Warrants [Member]
|
||
| Accounting Policies [Line Items] | ||
| Issued Warrants | 562,551 | |
| Fair Value Per Share $ as of September 30, 2012 | 1.53 | |
| Total Fair Value in Aggregate | 862,535 | 1,158,154 |
|
July 2012 Warrants [Member]
|
||
| Accounting Policies [Line Items] | ||
| Issued Warrants | 338,013 | |
| Fair Value Per Share $ as of September 30, 2012 | 1.56 | |
| Total Fair Value in Aggregate | 527,046 | 0 |
|
August 2012 Warrants [Member]
|
||
| Accounting Policies [Line Items] | ||
| Issued Warrants | 120,719 | |
| Fair Value Per Share $ as of September 30, 2012 | 1.58 | |
| Total Fair Value in Aggregate | 190,634 | 0 |
|
Advisory Agreement Warrants [Member]
|
||
| Accounting Policies [Line Items] | ||
| Issued Warrants | 1,837,777 | |
| Fair Value Per Share $ as of September 30, 2012 | 1.54 | |
| Total Fair Value in Aggregate | 2,831,135 | 3,784,870 |