Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended		160 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014
Cash flows from operating activities:
Net loss arising during the development stage	$ (18,607)	$ (7,971)	$ (114,904)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	3,534	766	7,831
Fair value of derivative liabilities in excess of proceeds			508
Gain on adjustment to fair value of derivative liabilities			(1,188)
Financing costs			406
Depreciation and amortization	34	33	105
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(405)	(114)	(861)
Accounts payable	163	(66)	700
Accrued liabilities	1,680	74	2,818
Net cash used in operating activities	(13,601)	(7,278)	(104,585)
Cash flows from investing activities:
Purchases of short-term investments	(35,007)		(35,007)
Purchases of property and equipment	(21)	(28)	(110)
Net cash used in investing activities	(35,028)	(28)	(35,117)
Cash flows from financing activities:
Net proceeds from issuance of common stock	32,726	25,271	159,113
Net proceeds from issuance of preferred stock			665
Financing costs			(406)
Net cash provided by financing activities	32,726	25,271	159,372
Net increase/(decrease) in cash and cash equivalents	(15,903)	17,965	19,670
Cash and cash equivalents at beginning of the period	35,573	6,202
Cash and cash equivalents at end of the period	$ 19,670	$ 24,167	$ 19,670
Supplemental cash flow information:
Issuance of common stock for purchase of intellectual property		500	500