Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities
Net loss	$ (8,985)	$ (14,463)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	761	561
Stock-based compensation	1,386	1,300
(Gain) Loss from revaluation of warrant liability	(3,822)	2,336
(Gain) Loss on sale of fixed assets	(20)	143
Gain on non-controlling equity interest	0	(315)
Non-cash interest expense	0	101
Changes in operating assets and liabilities, net of effects of acquired business:
Accounts receivable	9	113
Inventories	(3,634)	643
Other assets	(85)	(149)
Accounts payable	550	(1,347)
Accrued restructuring	0	(113)
Accrued liabilities	(472)	1,091
Deferred revenue	(174)	(112)
Net cash used in operating activities	(14,486)	(10,211)
Investing activities
Purchase of furniture, equipment and leasehold improvements	(117)	(1,690)
Purchase of certain other assets	(90)	(37)
Sales of investments	0	88
Maturities of investments	497	1,293
Net cash provided by (used in) investing activities	290	(346)
Financing activities
Net proceeds from issuance of common stock due to exercise of stock options and purchase from ESPP	142	356
Proceeds from note payable, net of discount	4,910	4,855
Payments on capital lease obligations and notes	(5,043)	(57)
Net cash provided by financing activities	9	5,154
Net decrease in cash and cash equivalents	(14,187)	(5,403)
Cash and cash equivalents, beginning of period	28,948	17,287
Cash and cash equivalents, end of period	14,761	11,884
Supplemental disclosures:
Common stock issued in connection with the acquisition of certain assets of BioOne	0	3,423
Cash paid for interest	$ 835	$ 379