Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Current assets:
Cash and cash equivalents	$ 197,896	$ 87,757
Marketable securities	5,711	24,572
Accounts receivable	6,013	54
Prepaid expenses and other current assets	3,775	2,313
Total current assets	213,395	114,696
Property and equipment, net	3,842	1,312
Other assets	1,883	344
Total assets	219,120	116,352
Commitments (Notes 4 and 10)
Current liabilities:
Accounts payable	9,185	5,684
Accrued liabilities	1,747	1,584
Deferred revenue - current portion	8,054	7,000
Total current liabilities	18,986	14,268
Deferred revenue - non-current portion	67,324
Deferred rent	687	410
Total liabilities	86,997	14,678
Commitments (Notes 4 and 10)
Stockholders' equity:
Preferred stock, $0.0001 par value; 1,000,000 shares authorized at June 30, 2012 and 2011; no shares issued and outstanding
Common stock, $0.0001 par value; 150,000,000 and 100,000,000 authorized at June 30, 2012 and 2011; shares issued and outstanding - 69,317,657 and 67,915,865 at June 30, 2012 and 2011	7	7
Additional paid-in capital	533,264	514,813
Accumulated other comprehensive loss	(9)	(21)
Accumulated deficit	(401,139)	(413,125)
Total stockholders' equity	132,123	101,674
Total liabilities and stockholders' equity	$ 219,120	$ 116,352