CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended		294 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
Operating activities:
Net loss	$ (12,706,000)	$ (22,824,000)	$ (283,060,000)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation and amortization	387,000	487,000	8,534,000
Loss on property held for resale			110,000
Amortization of discounts and premiums on investments			(1,704,000)
Stock compensation expense	528,000	3,166,000	18,023,000
Change in fair value of warrants	(3,331,000)	(3,289,000)	(19,868,000)
Inventory write downs			2,240,000
Stock issued pursuant to license agreement			3,300,000
Provision for losses on accounts receivable			204,000
Changes in operating assets and liabilities:
Inventories			(2,335,000)
Other current assets	(65,000)	272,000	(646,000)
Accounts payable and accrued expenses	(329,000)	281,000	2,686,000
Accrued employee benefits	(84,000)	(300,000)	299,000
Net cash used for operating activities	(15,600,000)	(22,207,000)	(272,217,000)
Investing activities:
Organizational costs			(73,000)
Purchase of short-term investments			(217,041,000)
Maturities of short-term investments			218,745,000
Property and equipment purchases	(40,000)	(169,000)	(7,530,000)
Proceeds from sale of property held for resale			400,000
Net cash used for investing activities	(40,000)	(169,000)	(5,499,000)
Financing activities:
Net proceeds from issuance of preferred stock		37,620,000	89,267,000
Net proceeds from issuance of common stock and warrants	12,848,000	346,000	197,902,000
Payments received for stock purchase rights and other, net			3,500,000
Proceeds from long-term debt			751,000
Principal payments under long-term debt obligations	(30,000)	(31,000)	(2,870,000)
Other, net			(18,000)
Net cash provided by financing activities	12,818,000	37,935,000	288,532,000
Net increase (decrease) in cash and cash equivalents	(2,822,000)	15,559,000	10,816,000
Cash and cash equivalents at beginning of period	13,638,000	5,530,000
Cash and cash equivalents at end of period	10,816,000	21,089,000	10,816,000
Supplemental cash flow information (non-cash):
Accretion of convertible preferred stock	1,263,000	2,738,000	6,224,000
Warrants exchanged for common stock		$ 10,382,000	$ 10,382,000