Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net loss	$ (4,448)	$ (4,253)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	93	89
Amortization of debt discount & issuance costs	701	574
Interest expense added to loan principal	860	771
Unrealized gain on derivative liability		(121)
Compensation charge for stock and share options	159	1,226
Changes in operating assets and liabilities:
Decrease in accounts receivable	2	96
Increase in prepaid expenses and other	(1,176)	(339)
Decrease (increase) in other assets	9	(115)
(Decrease) increase in accounts payable	(622)	497
Increase (decrease) in accrued liabilities	174	(411)
Increase in deferred revenue	228
Net cash used for operating activities	(4,020)	(1,986)
Cash flows from investing activities:
Additions to property, plant and equipment	(257)	(1,110)
Increase in restricted cash	(228)
Net cash used in investing activities	(485)	(1,110)
Cash flows from financing activities:
Principal payments on long-term debt	(4)	(4)
Net cash provided used in financing activities	(4)	(4)
Net decrease in cash and cash equivalents	(4,509)	(3,100)
Cash and cash equivalents, beginning of period	11,370	5,911
Cash and cash equivalents, end of period	$ 6,861	$ 2,811