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Summary Of Warrants Outstanding (Detail)
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3 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2013
|
Feb. 19, 2013
|
Mar. 31, 2012
|
Mar. 31, 2013
Ipo
|
Mar. 31, 2013
Sep 20, 2012 Private Placement
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Mar. 31, 2013
2009 private placement
|
Mar. 31, 2013
November 13, 2012 private placement
|
Mar. 31, 2013
Ipo underwriters
|
Mar. 31, 2013
February 2013 private placement
|
Mar. 31, 2013
Co placement agents
|
Mar. 31, 2013
Placement Agent
Sep 20, 2012 Private Placement
|
Mar. 31, 2013
Placement Agent
November 13, 2012 private placement
|
|
| Warrants and Rights Note Disclosure [Line Items] | ||||||||||||
| Class of warrant or right, outstanding | 8,610,665 | 4,807,534 | 4,043,569 | 2,125,000 | 503,034 | 1,185,000 | 400,000 | 18,250 | 212,500 | 118,500 | ||
| Class of warrant or right, number of securities called by warrants or rights | 4,812 | |||||||||||
| Class of warrant or right, exercise price of warrants or rights | 1.50 | 3.4375 | 0.4 | 3.4375 | 0.40 | 1.50 | 7.84 | 0.40 | 0.40 | |||
| Class of warrant or right number of securities called by warrants or rights weighted average exercise price | 3.9 | |||||||||||
| Class of warrant or right expiration date | Mar. 24, 2015 | Sep. 20, 2017 | Oct. 29, 2014 | Nov. 13, 2017 | Feb. 19, 2018 | Oct. 29, 2014 | Sep. 20, 2017 | Nov. 13, 2017 | ||||
| Class of warrant or right number of securities called by warrants or rights expiry date | Mar. 24, 2015 | |||||||||||