Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 69,643	$ 48,164
Short-term investments	30,752	50,334
Restricted cash	238	238
Accounts receivable	15,606	12,076
Inventory	330	178
Prepaid expenses and other assets	3,179	2,180
Total current assets	119,748	113,170
Property and equipment, net	1,706	2,245
Long-term investments		67
Intangible asset, net	4,885	5,225
Other assets		49
Total assets	126,339	120,756
LIABILITIES AND STOCKHOLDERS' EQUITY
Trade accounts payable	2,488	4,931
Deferred revenue	6,084
Accrued liabilities	19,047	17,627
Total current liabilities	27,619	22,558
Long-term deferred revenue	15,258
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.001 par value; 200,000,000 shares authorized; 105,679,986 and 105,493,546 shares issued and outstanding at September 30, 2011 and December 31, 2010, respectively	106	105
Additional paid-in capital	558,276	548,722
Accumulated deficit	(474,920)	(450,629)
Total stockholders' equity	83,462	98,198
Total liabilities and stockholders' equity	126,339	120,756
Preferred Stock [Member]
Stockholders' equity:
Preferred stock, $0.001 par value; no shares issued or outstanding
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity:
Preferred stock, $0.001 par value; no shares issued or outstanding