Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net loss	$ (11,082)	$ (18,426)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	185	135
Provision for bad debt	(32)	6
Provision for inventory obsolescence	(42)	59
Loss (gain) on asset disposal	5
Stock-based compensation	1,738	8,490
Increase (decrease) in cash resulting from changes in:
Current assets	190	(1,080)
Current liabilities	581	(427)
Net cash flows from operating activities	(8,457)	(11,243)
Investing activities:
Purchase of intangible assets	(8)	(54)
Purchase of property and equipment	(457)	(929)
Proceeds from sale of licensing rights	13	14
Net cash flows from investing activities	(452)	(969)
Financing activities:
Proceeds from issuance of common stock	10,000	13,831
Proceeds from stock and warrant exercise	3,158
Payments on long-term debt and capital lease obligation	(1,259)	(809)
Net cash flows from financing activities	11,899	13,022
Increase in cash and cash equivalents	2,990	810
Cash and cash equivalents, beginning of period	13,193	12,360
Cash and cash equivalents, end of period	16,183	13,170
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	$ 71	$ 194