|
Stockholders' Equity (Details) (USD $)
|
3 Months Ended |
6 Months Ended |
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
$ 29,035,665 |
|
| Net loss |
(6,479,554) |
(6,752,668) |
(13,062,656) |
(13,995,868) |
| Foreign currency translation gain (loss) |
(80,543) |
(18,160) |
(4,040) |
86,032 |
| Stock based compensation |
|
|
1,006,390 |
|
| Public offering common stock, net |
|
|
15,794,025 |
|
| Balance |
32,769,384 |
|
32,769,384 |
|
|
Common Stock
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
229,244 |
|
| Balance (shares) |
|
|
22,924,411 |
|
| Net loss |
|
|
|
|
| Foreign currency translation gain (loss) |
|
|
|
|
| Stock based compensation |
|
|
1,765 |
|
| Stock based compensation (shares) |
|
|
176,451 |
|
| Public offering common stock, net |
|
|
149,500 |
|
| Public offering common stock, net (shares) |
|
|
14,950,000 |
|
| Balance |
380,509 |
|
380,509 |
|
| Balance (shares) |
38,050,862 |
|
38,050,862 |
|
|
Additional Paid-in-Capital
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
784,213,871 |
|
| Net loss |
|
|
|
|
| Foreign currency translation gain (loss) |
|
|
|
|
| Stock based compensation |
|
|
1,004,625 |
|
| Public offering common stock, net |
|
|
15,644,525 |
|
| Balance |
800,863,021 |
|
800,863,021 |
|
|
Accumulated Other Comprehensive Income (Loss)
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
928,744 |
|
| Net loss |
|
|
|
|
| Foreign currency translation gain (loss) |
|
|
(4,040) |
|
| Stock based compensation |
|
|
|
|
| Public offering common stock, net |
|
|
|
|
| Balance |
924,704 |
|
924,704 |
|
|
Treasury Stock
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
(1,552,382) |
|
| Balance (shares) |
|
|
165,906 |
|
| Net loss |
|
|
|
|
| Foreign currency translation gain (loss) |
|
|
|
|
| Stock based compensation |
|
|
|
|
| Stock based compensation (shares) |
|
|
|
|
| Public offering common stock, net |
|
|
|
|
| Public offering common stock, net (shares) |
|
|
|
|
| Balance |
(1,552,382) |
|
(1,552,382) |
|
| Balance (shares) |
165,906 |
|
165,906 |
|
|
Accumulated Deficit
|
|
|
|
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
| Balance |
|
|
(754,783,812) |
|
| Net loss |
|
|
(13,062,656) |
|
| Stock based compensation |
|
|
|
|
| Stock based compensation (shares) |
|
|
|
|
| Public offering common stock, net |
|
|
|
|
| Balance |
$ (767,846,468) |
|
$ (767,846,468) |
|