Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable, current (in dollars)	$ 2,014	$ 1,516
Common stock, par or stated value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares, issued	19,014,379	18,674,860
Common stock, shares, outstanding	19,014,379	18,674,860