Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (14,405)	$ (14,809)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	771	1,013
Share-based compensation	70	750
Loss on disposal of assets		18
Change in fair value of warrants	88	(346)
Changes in operating assets and liabilities:
Accounts receivable, net	(616)	479
Product inventories	(1,211)	246
Prepaid expenses and other current assets	(3,687)	36
Trade accounts payable	(203)	(740)
Accrued salaries and benefits	(280)	694
Accrued warranty	43	68
Deferred revenues	3,710	(1,029)
Accrued liabilities	24	98
Net cash used in operating activities	(15,696)	(13,522)
Cash flows from investing activities:
Increase in restricted cash	(293)
Purchase of property, plant and equipment	(170)	(343)
Proceeds from disposition of assets		5
Net cash used in investing activities	(463)	(338)
Cash flows from financing activities:
Issuance of common shares for cash, net of issuance costs	1,050	61,851
Payment on warrant redemption		(530)
Proceeds from notes payable	1,000	1,500
Payment of note payable		(198)
Repayment of capital lease obligation	(4)	(17)
Net cash provided by (used in) financing activities	2,046	62,606
Effect of exchange rate changes on cash and cash equivalents	(193)
Net (decrease) increase in cash and cash equivalents	(14,306)	48,746
Cash and cash equivalents, beginning of period	46,519	4,695
Cash and cash equivalents, end of period	32,213	53,441
Supplemental disclosures:
Cash paid for interest	28	153
Cash paid for income taxes	0	0
Non-cash transactions:
Acquisition of assets included in accounts payable		$ 38