BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Equipment, accumulated depreciation	$ 704	$ 682
Intangible assets, accumulated amortization	$ 426	$ 364
Preferred stock, shares authorized	5,000,000	5,000,000
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, issued	27,997,701	27,918,148
Common Stock, outstanding	27,997,701	27,918,148
Preferred Stock Series A
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares designated	650	650
Preferred stock, shares issued	645	645
Preferred stock, shares outstanding	645	645
Preferred stock, liquidation preference	$ 1	$ 1
Preferred Stock Series C
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares designated	700,000	700,000
Preferred stock, shares issued	275,235	278,849
Preferred stock, shares outstanding	275,235	278,849
Preferred stock, liquidation preference	$ 7,752	$ 8,369
Preferred Stock Series D
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares designated	792,100	792,100
Preferred stock, shares issued	734,898	734,898
Preferred stock, shares outstanding	734,898	734,898
Preferred stock, liquidation preference	$ 31,355	$ 32,547