Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net loss	$ (17,647)	$ (23,249)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	275	220
Provision for bad debt	(39)	44
Provision for inventory obsolescence	676	59
Loss (gain) on asset disposal	5
Stock-based compensation	2,470	8,724
Increase (decrease) in cash resulting from changes in:
Current assets	(341)	(3,626)
Current liabilities	955	208
Net cash flows from operating activities	(13,646)	(17,620)
Investing activities:
Purchase of intangible assets	(10)	(61)
Purchase of property and equipment	(465)	(990)
Proceeds from sale of licensing rights	20	18
Net cash flows from investing activities	(455)	(1,033)
Financing activities:
Proceeds from issuance of common stock	10,000	13,832
Proceeds from stock and warrant exercise	3,159
Payments on long-term debt and capital lease obligation	(1,889)	(1,365)
Net cash flows from financing activities	11,270	12,467
Deposits to MSA escrow		(3)
Increase (decrease) in cash and cash equivalents	(2,831)	(6,189)
Cash and cash equivalents, beginning of period	13,193	12,360
Cash and cash equivalents, end of period	10,362	6,171
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	$ 65	$ 91