Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Current Assets:
Allowance for doubtful accounts receivable	$ 430	$ 339
Preferred stock, $0.001 par value; 5,000,000 shares authorized:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	57,403,724	51,459,284
Common stock, shares outstanding	57,403,724	51,459,284
Series B junior participating preferred stock
Preferred stock, $0.001 par value; 5,000,000 shares authorized:
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Series E convertible preferred stock
Preferred stock, $0.001 par value; 5,000,000 shares authorized:
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