Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Allowance for doubtful accounts	$ 961	$ 602
Equity:
Convertible preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized	50,691,000	50,691,000
Convertible preferred stock, shares issued	0	50,691,000
Convertible preferred stock, shares outstanding (in shares)	0	50,691,000
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	785,000,000	679,178,000
Common stock, shares issued	91,270,064	72,528,569
Common stock, shares outstanding	91,270,064	72,528,569