Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Current assets:
Cash and cash equivalents	$ 35,573	$ 6,202
Prepaid expenses and other current assets	456	146
Total current assets	36,029	6,348
Intangible assets, net	470
Property and equipment, net	48	25
Total assets	36,547	6,373
Current liabilities:
Accounts payable	537	594
Accrued liabilities	1,138	1,180
Total current liabilities	1,675	1,774
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock
Common stock, $0.00000002 par value; 113,000,000 shares authorized; 17,116,571 shares and 3,416,491 shares issued and outstanding at June 30, 2013 and 2012, respectively
Additional paid-in-capital	131,169	89,710
Deficit accumulated during the development stage	(96,297)	(85,111)
Total stockholders' equity	34,872	4,599
Total liabilities and stockholders' equity	36,547	6,373
Series A Preferred Stock
Stockholders' equity:
Preferred stock
Series B Preferred Stock
Stockholders' equity:
Preferred stock