Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (11,900,000)	$ (9,032,000)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	128,000	188,000
Amortization of debt discount and issuance costs	1,362,000	1,425,000
Interest expense added to loan principal	2,664,000	1,733,000
Loss on early extinguishment of debt and debt refinancing	835,000
Compensation charge for stock and share options	453,000	232,000
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	171,000	(27,000)
Increase in prepaid expenses and other	(381,000)	(910,000)
(Increase) decrease in other assets	(2,917,000)	31,000
Decrease in accounts payable	(420,000)	(832,000)
(Decrease) increase in accrued liabilities	(546,000)	575,000
Increase in deferred revenue		553,000
Net cash used for operating activities	(10,551,000)	(6,064,000)
Cash flows from investing activities:
Additions to property, plant and equipment	(167,000)	(858,000)
Increase in restricted cash		(428,000)
Net cash used for investing activities	(167,000)	(1,286,000)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	17,500,000
Debt issuance costs	(1,243,000)
Principal payments on long-term debt	(5,000)	(4,000)
Net cash provided by (used for) financing activities	16,252,000	(4,000)
Net increase (decrease) in cash and cash equivalents	5,534,000	(7,354,000)
Cash and cash equivalents, beginning of period	1,685,000	11,370,000
Cash and cash equivalents, end of period	$ 7,219,000	$ 4,016,000