Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net loss	$ (6,808)	$ (9,397)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	64	101
Gain on disposal of assets		(27)
Foreign exchange (gain) loss	(659)	1,244
Stock-based compensation expense	500	458
Excess inventory expense	361
Amortization of deferred financing costs and discount on loans	211	22
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	14	(44)
Increase in inventory	(27)	(306)
(Increase) decrease in prepaid expenses and other current assets	(55)	42
Increase in accounts payable	227	623
(Decrease) increase in accrued research contract costs	(16)	114
Increase (decrease) in other accrued liabilities	425	(13)
Increase in deferred revenue		5,000
Recognition of deferred revenue	(445)	(365)
Decrease in other liabilities	(136)	(207)
Net cash used in operating activities	(6,344)	(2,755)
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		27
Purchases of property and equipment	(2)	(2)
Net cash provided by investing activities	116	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	6,389
Proceeds from loans and warrants	8,600
Deferred financing costs	(95)	(109)
Repayment of loans	(1,015)	(426)
Net cash provided by financing activities	18,362	5,916
Effect of exchange rate changes on cash and cash equivalents	9	(1)
Net increase in cash and cash equivalents	12,143	3,205
Cash and cash equivalents at beginning of year	2,435	5,142
Cash and cash equivalents at end of period	14,578	8,347
Supplemental disclosure of cash flow information:
Cash paid for interest	124	77
Cash paid for income taxes	2	5
Supplemental disclosure of non-cash financing activities:
Unpaid costs associated with issuance of common stock		82
Unpaid financing costs	$ 658	$ 415