Condensed Consolidated Statement Of Operations And Comprehensive Loss (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statement Of Operations And Comprehensive Loss [Abstract]
Sales and marketing, non cash items	$ 540	$ 629
General and administrative, non-cash items	$ 1,079	$ 3,871