Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 87,634	$ 21,127
Short-term investments	243,062	260,682
Interest receivable	641	782
Accounts receivable, net	54,955	19,279
Inventories	9,469	0
Prepaid expenses and other current assets	3,820	2,246
Total current assets	399,581	304,116
Property and equipment, net	19,652	12,311
Long-term investments	0	13,031
Other non-current assets	5,983	478
Total assets	425,216	329,936
Liabilities and Stockholders' Equity
Accounts payable and accrued liabilities	53,048	25,783
Current portion of deferred revenue	38,092	29,038
Total current liabilities	91,140	54,821
Long-term liabilities
Deferred revenue, less current portion	110,013	110,630
Deferred rent and other long-term liabilities	5,214	2,967
Total long-term liabilities	115,227	113,597
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.001 par value, 5,000 shares authorized; none issued	0	0
Common stock, $0.001 par value, 250,000 shares authorized at December 31, 2011 and 150,000 shares authorized at December 31, 2010; 116,023 shares issued and outstanding at December 31, 2011 and 101,607 shares issued and outstanding at December 31, 2010	116	102
Additional paid-in capital	832,713	624,759
Accumulated other comprehensive gain (loss)	20	(1,373)
Accumulated deficit	(614,000)	(461,970)
Total stockholders' equity	218,849	161,518
Total liabilities and stockholders' equity	$ 425,216	$ 329,936