Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (12,205)	$ (12,565)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	96	137
Gain on disposal of assets		(27)
Foreign exchange (gain) loss	(38)	357
Stock-based compensation expense	753	705
Excess inventory expense	361	316
Amortization of deferred financing costs and discount on loans	762	33
Changes in operating assets and liabilities:
Increase in inventory	(1)	(580)
(Increase) decrease in prepaid expenses and other current assets	(39)	32
(Decrease) increase in accounts payable	(192)	196
Increase (decrease) in accrued research contract costs	768	(189)
Increase in other accrued liabilities	522	155
Increase in deferred revenue		5,000
Recognition of deferred revenue	(668)	(583)
Decrease in other liabilities	(204)	(266)
Net cash used in operating activities	(10,085)	(7,279)
Cash flows from investing activities:
Release of restricted cash in connection with conversion of 7.5556% convertible subordinated notes	118	20
Proceeds from sale of property and equipment	5	27
Purchases of property and equipment	(12)	(2)
Net cash provided by investing activities	111	45
Cash flows from financing activities:
Proceeds from exercise of stock options and warrants		62
Proceeds from issuance of common stock and warrants, net of issuance costs	10,872	6,307
Proceeds from loans and warrants	8,600
Deferred financing costs	(273)	(244)
Repayment of loans	(1,043)	(452)
Net cash provided by financing activities	18,156	5,673
Effect of exchange rate changes on cash and cash equivalents	(1)	(1)
Net increase (decrease) in cash and cash equivalents	8,181	(1,562)
Cash and cash equivalents at beginning of year	2,435	5,142
Cash and cash equivalents at end of period	10,616	3,580
Supplemental disclosure of cash flow information:
Cash paid for interest	394	83
Cash paid for income taxes	4	5
Supplemental disclosure of non-cash financing activities:
Unpaid costs associated with issuance of common stock		91
Unpaid financing costs	$ 310	$ 474