Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Current assets:
Cash and cash equivalents	$ 230,214	$ 87,757
Marketable securities	10,116	24,572
Accounts receivable	1,171	54
Prepaid expenses and other current assets	3,381	2,313
Total current assets	244,882	114,696
Property and equipment, net	2,528	1,312
Other assets	344	344
Total assets	247,754	116,352
Current liabilities:
Accounts payable	7,527	5,684
Accrued liabilities	1,226	1,584
Income tax payable	5,651
Deferred revenue - current portion	8,041	7,000
Total current liabilities	22,445	14,268
Deferred revenue - non-current portion	71,174
Deferred rent	547	410
Total liabilities	94,166	14,678
Stockholders' equity:
Preferred stock, $0.0001 par value; 1,000,000 shares authorized at December 31 and June 30, 2011; no shares issued and outstanding
Common stock, $0.0001 par value; 150,000,000 and 100,000,000 authorized at December 31 and June 30, 2011; shares issued and outstanding - 68,732,939 and 67,915,865 at December 31 and June 30, 2011	7	7
Additional paid-in capital	524,998	514,813
Accumulated other comprehensive loss	(7)	(21)
Deficit accumulated during development stage		(413,125)
Accumulated deficit	(371,410)
Total stockholders' equity	153,588	101,674
Total liabilities and stockholders' equity	$ 247,754	$ 116,352