Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net loss for basic EPS	$ 41,933,000	$ (34,389,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	5,292,000	3,364,000
Share-Based Compensation, Restructuring Costs	0	201,000
Depreciation and amortization	820,000	945,000
Amortization of debt issuance costs and non-cash interest	287,000	276,000
Loss on early extinguishment of debt	1,254,000	0
Net gain on sale of business	(79,980,000)	0
Impairment of long-lived assets	838,000	0
Change in fair value of warrant liabilities	(18,470,000)	2,995,000
Change in fair value of embedded derivatives	14,000	562,000
Changes in operating assets and liabilities:
Trade accounts receivable	745,000	1,505,000
Inventory, net	(5,720,000)	(299,000)
Prepaid expenses and other current assets	(9,378,000)	210,000
Other assets	(4,995,000)	498,000
Accounts payable and accrued expenses	10,666,000	(584,000)
Restructuring liabilities	0	146,000
Deferred revenue	15,990,000	0
Net cash used in operating activities	(40,704,000)	(24,570,000)
Investing activities:
Purchases of property and equipment	83,000	(798,000)
Proceeds from sale of business	89,624,000	0
Restricted cash from sale of business	(8,500,000)	0
Net cash provided by (used in) investing activities	81,207,000	(798,000)
Financing activities:
Proceeds from note payable	7,000,000	0
Repayment of debt	40,041,000	0
Proceeds from exercise of common stock options	1,508,000	0
Proceeds from issuance of common stock and common stock warrants	244,000	261,000
Net cash provided by financing activities	(31,289,000)	261,000
Net (decrease) increase in cash and cash equivalents	9,214,000	(25,107,000)
Cash and cash equivalents at beginning of period	72,021,000	41,228,000
Cash and cash equivalents at end of period	$ 81,235,000