|
Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details) (USD $)
|
0 Months Ended | 1 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 04, 2012
|
Mar. 31, 2011
|
Jun. 30, 2010
|
Oct. 23, 2009
|
Jun. 09, 2009
|
Dec. 18, 2007
|
Dec. 31, 2010
|
Nov. 30, 2010
|
May 31, 2010
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Warrants [Abstract] | ||||||||||||
| Number of warrants, Outstanding | 8,676,142 | 5,624,583 | ||||||||||
| Weigted average exercise price, Outstanding | $ 0.89 | $ 1.53 | $ 1.48 | |||||||||
| Number of warrants, Issued | 10,521,739 | 3,333,333 | 2,000,000 | 2,125,334 | 862,246 | 107,144 | 12,980,000 | 3,541,666 | ||||
| Weighted average exercise price, Issued | $ 0.47 | $ 1.50 | ||||||||||
| Number of warrants, Exercised | (530,900) | (936,883) | (890,051) | (333,959) | ||||||||
| Weighted average exercise price, Exercised | $ 0.95 | |||||||||||
| Number of warrants, Expired | (156,148) | |||||||||||
| Weighted average exercise price, Expired | $ 0.82 | |||||||||||
| Number of warrants, Outstanding | 5,624,583 | 21,656,142 | 8,676,142 | 5,624,583 | ||||||||
| Weigted average exercise price, Outstanding | $ 0.89 | $ 1.53 | $ 1.48 | |||||||||