Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Jun. 30, 2011
Current assets:
Cash and cash equivalents	$ 213,469	$ 87,757
Marketable securities	1,494	24,572
Accounts receivable	12,905	54
Prepaid expenses and other current assets	2,623	2,313
Total current assets	230,491	114,696
Property and equipment, net	3,075	1,312
Other assets	386	344
Total assets	233,952	116,352
Current liabilities:
Accounts payable	8,686	5,684
Accrued liabilities	2,004	1,584
Income tax payable	328
Deferred revenue - current portion	8,057	7,000
Total current liabilities	19,075	14,268
Deferred revenue - non-current portion	69,369
Deferred rent	604	410
Total liabilities	89,048	14,678
Stockholders' equity:
Preferred stock, $0.0001 par value; 1,000,000 shares authorized at March 31, 2012 and June 30, 2011; no shares issued and outstanding
Common stock, $0.0001 par value; 150,000,000 and 100,000,000 authorized at March 31, 2012 and June 30, 2011; shares issued and outstanding - 68,926,876 and 67,915,865 at March 31, 2012 and June 30, 2011	7	7
Additional paid-in capital	529,130	514,813
Accumulated other comprehensive loss		(21)
Deficit accumulated during development stage		(413,125)
Accumulated deficit	(384,233)
Total stockholders' equity	144,904	101,674
Total liabilities and stockholders' equity	$ 233,952	$ 116,352