Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Allowance for doubtful accounts receivable	$ 630	$ 339
Stockholders' Equity:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	52,947,221	51,459,284
Common stock, shares outstanding	52,947,221	51,459,284
Series B junior participating preferred stock
Stockholders' Equity:
Preferred stock, shares authorized	5,000,000	5,000,000
Series E convertible preferred stock
Stockholders' Equity:
Preferred stock, par value	$ 10,000	$ 10,000
Preferred stock, shares authorized	2,000	2,000
Preferred stock, shares issued	20	26
Preferred stock, shares outstanding	20	26
Preferred stock, liquidation value	$ 240	$ 240