Exhibit 12

Computation of the Ratio of Earnings To Cover Fixed Charges and

Preference Dividends

	2002			2003			2004			2005			2006
Pre-tax income from continuing operations	$	(34,917	)	$	(33,288	)	$	(33,924	)	$	(27,641	)	$	(32,432	)
Fixed charges		111			78			509			4,176			5,962
Earnings available to cover fixed charges		(34,806	)		(33,210	)		(33,415	)		(23,465	)		(26,470	)
Fixed charges
Interest on indebtedness		59			51			151			3,253			5,753
Interest attributable to rental property (a)		52			27			12			6			12
Preferred stock dividend requirements		—			—			346			917			197
		111			78			509			4,176			5,962
Ratio of earnings to cover fixed charges (b)		N/A			N/A			N/A			N/A			N/A
Additional earnings required to cover fixed charges	$	34,917		$	33,288		$	33,924		$	27,641		$	32,432

(a) Based on a reasonable approximation of the interest factor.

(b) As earnings were insufficient to cover fixed charges and preferred dividends, if any, no ratio has been presented.