Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Net loss	$ (13,768)	$ (12,087)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	285	273
Amortization of debt discount and issuance costs	2,196	1,765
Interest expense added to loan principal	2,628	2,405
Unrealized gain on derivative liability		(108)
Compensation charge for stock and share options	314	2,069
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	(233)	133
Increase in inventories	(316)	(236)
Increase in prepaid expenses and other	(606)	(203)
Decrease (increase) in other assets	31	(83)
Increase in accounts payable	76	200
Increase in accrued liabilities	974	28
Increase in deferred revenue	250	500
Net cash used for operating activities	(8,169)	(5,344)
Cash flows from investing activities:
Additions to property, plant and equipment	(1,449)	(3,103)
Increase in restricted cash	(428)
Net cash used for investing activities	(1,877)	(3,103)
Cash flows from financing activities:
Net proceeds from issuance of common stock		4,000
Proceeds from issuance of long-term debt	56	2,000
Principal payments on long-term debt	(7)	(12)
Net cash provided by financing activities	49	5,988
Net decrease in cash and cash equivalents	(9,997)	(2,459)
Cash and cash equivalents, beginning of period	11,370	5,911
Cash and cash equivalents, end of period	$ 1,373	$ 3,452