Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (16,697,000)	$ (13,768,000)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	191,000	285,000
Amortization of debt discount and issuance costs	1,418,000	2,196,000
Interest expense added to loan principal	4,297,000	2,628,000
Loss on early extinguishment of debt and debt refinancing	835,000
Compensation charge for stock and share options	483,000	314,000
Changes in operating assets and liabilities:
Increase in accounts receivable	(96,000)	(233,000)
Increase in inventories	(217,000)	(316,000)
Increase in prepaid expenses and other	(67,000)	(606,000)
(Increase) decrease in other assets	(2,774,000)	31,000
Increase in accounts payable	173,000	76,000
(Decrease ) increase in accrued liabilities	(172,000)	974,000
Increase in deferred revenue		250,000
Net cash used for operating activities	(12,626,000)	(8,169,000)
Cash flows from investing activities:
Additions to property, plant and equipment	(167,000)	(1,449,000)
Increase in restricted cash		(428,000)
Net cash used for investing activities	(167,000)	(1,877,000)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	17,500,000	56,000
Debt issuance costs	(1,243,000)
Principal payments on long-term debt	(8,000)	(7,000)
Net cash provided by financing activities	16,249,000	49,000
Net increase (decrease) in cash and cash equivalents	3,456,000	(9,997,000)
Cash and cash equivalents, beginning of period	1,685,000	11,370,000
Cash and cash equivalents, end of period	$ 5,141,000	$ 1,373,000