| Year Ended December 31, | Three Months | |||||||||||||||||||||||
| 2006 | 2007 | 2008 | 2009 | 2010 | Ended March 31, 2011 | |||||||||||||||||||
| EARNINGS: | ||||||||||||||||||||||||
| Net loss | $ | (6,486 | ) | $ | (4,442 | ) | $ | (3,682 | ) | $ | (2,903 | ) | $ | (14,022 | ) | $ | (4,436 | ) | ||||||
| Plus fixed charges | 70 | 72 | 74 | 64 | 56 | 15 | ||||||||||||||||||
| Total loss to cover fixed charges | (6,416 | ) | (4,370 | ) | (3,608 | ) | (2,839 | ) | (13,966 | ) | (4,421 | ) | ||||||||||||
| FIXED CHARGES: | ||||||||||||||||||||||||
| Interest portion of rental expense (see below) | 70 | 72 | 74 | 64 | 56 | 15 | ||||||||||||||||||
| DEFICIENCY OF EARNINGS TO COVER FIXED CHARGES | $ | (6,486 | ) | $ | (4,442 | ) | $ | (3,682 | ) | $ | (2,903 | ) | $ | (14,022 | ) | $ | (4,436 | ) | ||||||
