Condensed Consolidated Balance Sheets [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Allowance for trade accounts receivable (in dollars)	$ 19	$ 19
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	5,000,000,000	5,000,000,000
Common stock, shares issued	893,409,351	541,999,246
Common stock, shares outstanding	893,394,216	541,984,111
Treasury stock, shares	2,012	2,012
Series C Convertible Preferred Stock [Member]
Convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible preferred stock, shares authorized	27,000	27,000
Convertible preferred stock, shares issued	4,840	5,086
Convertible preferred stock, shares outstanding	4,840	5,086
Convertible preferred stock, liquidation value (in dollars)	4,840	5,086
Series D Convertible Preferred Stock [Member]
Convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible preferred stock, shares authorized	25,000	25,000
Convertible preferred stock, shares issued	9,892	13,950
Convertible preferred stock, shares outstanding	9,892	13,950
Convertible preferred stock, liquidation value (in dollars)	$ 989	$ 1,395