Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net loss	$ (22,677,000)	$ (19,574,000)	$ (16,837,000)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	254,000	350,000	365,000
Amortization of deferred loan costs	223,000	108,000	72,000
Amortization of debt discount	1,352,000	3,123,000	2,372,000
Interest expense added to loan principal	6,069,000	3,589,000	3,261,000
Loss on early extinguishment of debt and debt refinancing	835,000
Unrealized gain on derivative liability			(108,000)
Compensation charge for stock awards and share options	516,000	383,000	2,376,000
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	(31,000)	(121,000)	138,000
Decrease (increase) in prepaid expenses and other	54,000	200,000	(305,000)
(Increase) decrease in other assets	(2,744,000)	(109,000)	63,000
Increase in accounts payable	43,000	128,000	304,000
Increase in accrued liabilities	339,000	273,000	285,000
Increase in deferred revenue		250,000	500,000
Net cash used for operating activities	(15,767,000)	(11,400,000)	(7,514,000)
Cash flows from investing activities:
Additions to property, plant and equipment	(167,000)	(3,226,000)	(4,140,000)
Increase in other Assets (restricted cash)		(63,000)
Net cash used for investing activities	(167,000)	(3,289,000)	(4,140,000)
Cash flows from financing activities:
Net proceeds from issuance of common stock			15,129,000
Net proceeds from issuance of long-term debt	27,390,000	5,014,000	2,000,000
Debt issuance costs	(1,243,000)
Principal payments on long-term debt	(11,000)	(10,000)	(16,000)
Net cash provided by financing activities	26,136,000	5,004,000	17,113,000
Net increase (decrease) in cash and cash equivalents	10,202,000	(9,685,000)	5,459,000
Cash and cash equivalents, beginning of period	1,685,000	11,370,000	5,911,000
Cash and cash equivalents, end of period	$ 11,887,000	$ 1,685,000	$ 11,370,000