Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts	$ 13	$ 17
Stockholders' equity (deficit):
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	6,000,000	0
Preferred stock, shares outstanding	6,000,000	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	21,539,370
Common stock, shares outstanding	25,094,045	4,526,603
Treasury stock, shares	2,009
Redeemable Convertible Preferred Stock [Member]
Redeemable and convertible preferred stock:
Redeemable convertible preferred stock series A-2, shares authorized	0	506,646
Redeemable convertible preferred stock series A-2, shares issued	0	502,874
Redeemable convertible preferred stock series A-2, shares outstanding	0	502,874
Redeemable convertible preferred stock series A-2, par value	$ 0.01	$ 0.01
Convertible Preferred Stock [Member]
Redeemable and convertible preferred stock:
Redeemable convertible preferred stock series A-2, shares authorized	0	4,062,540
Redeemable convertible preferred stock series A-2, shares issued	0	3,991,617
Redeemable convertible preferred stock series A-2, shares outstanding	0	3,991,617
Redeemable convertible preferred stock series A-2, par value	$ 0.01	$ 0.01
Convertible preferred stock, liquidation value		$ 73,931