Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (14,809)	$ (16,278)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,013	1,450
Gain on discontinued operations		(129)
Securities received in payment of license fees		5
Share-based compensation	750	998
Change in market value of warrants	(346)
Loss on disposal of fixed assets	18	39
Impairment of patents		47
Changes in operating assets and liabilities:
Accounts receivable, net	479	(195)
Product inventories	246	(1,400)
Prepaid expenses and other current assets	36	(477)
Other assets		125
Trade accounts payable	(740)	1,835
Accrued salaries and benefits	694	939
Accrued warranty	68	52
Deferred revenues	(1,029)	3,153
Accrued liabilities	98	(14)
Net cash used in operating activities	(13,522)	(9,850)
Cash flows from investing activities:
Purchase of property, plant and equipment	(343)	(955)
Proceeds from disposition of assets	5	8
Net cash used in investing activities	(338)	(947)
Cash flows from financing activities:
Issuance of common shares for cash, net of issuance costs paid	61,851	709
Payment of warrant redemptions	(530)
Proceeds from notes payable	1,500	122
Payment of notes payable	(198)	(600)
Repayment of long-term debt	(17)	(14)
Net cash provided by financing activities	62,606	217
Net increase (decrease) in cash and cash equivalents	48,746	(10,580)
Cash and cash equivalents, beginning of period	4,695	18,122
Cash and cash equivalents, end of period	53,441	7,542
Supplemental disclosures:
Cash paid for interest	153	45
Cash paid for income taxes	0	0
NON-CASH TRANSACTIONS:
Acquisition of assets included in accounts payable	38	7
Issuance of 710,976 shares of restricted stock to directors		320
Unrealized loss on available for sale securities		$ (133)