|
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|---|---|---|---|
| Preferred stock, par value | $ 0.001 | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 10,000,000 | 10,000,000 | 10,000,000 |
| Common stock, par value | $ 0.001 | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 200,000,000 | 200,000,000 | 200,000,000 |
| Common stock, shares issued | 23,293,586 | 21,210,445 | 16,967,244 |
| Common stock, shares outstanding | 23,293,586 | 21,210,445 | 16,967,244 |
|
Series B Convertible Preferred Stock [Member]
|
|||
| Preferred stock, par value | $ 0.001 | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 10,000 | 10,000 | 10,000 |
| Preferred stock - Series B, stated value | $ 1,000 | $ 1,000 | $ 1,000 |
| Preferred stock - Series B, liquidation preference | $ 5,659,000 | $ 5,679,000 | $ 5,739,000 |
| Preferred stock, shares issued | 5,659 | 5,679 | 5,739 |
| Preferred stock, shares outstanding | 5,659 | 5,679 | 5,739 |