Consolidated Statements of Cash Flows In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)
Cash flows from operating activities:
Net loss	$ (17,986)	$ (19,933)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,071	1,324
Share-based compensation	131	740
Loss on disposal of assets		924
Change in fair value of warrants	(564)	(1,274)
Changes in operating assets and liabilities:
Accounts receivable, net	(1,165)	985
Product inventories	(2)	(67)
Prepaid expenses and other current assets	(1,129)	29
Deferred contract costs	(3,854)
Trade accounts payable	(2,221)	2,959
Accrued salaries and benefits	(500)	389
Accrued warranty	64	143
Deferred revenues	5,602	(900)
Accrued liabilities	(37)	34
Net cash used in operating activities	(20,590)	(14,647)
Cash flows from investing activities:
Increase in restricted cash	(18,048)
Purchase of property, plant and equipment	(253)	(604)
Purchase of land use right	(13,625)
Net cash used in investing activities	(31,926)	(604)
Cash flows from financing activities:
Issuance of common shares for cash, net of issuance costs		57,826
Payment on warrant redemption		(530)
Proceeds from notes payable	6,680	1,500
Payment of note payable		(1,705)
Deferred income	11,803
Repayment of capital lease obligation	(2)	(16)
Net cash provided by financing activities	18,481	57,075
Effect of exchange rate changes on cash and cash equivalents	(112)
Net (decrease) increase in cash and cash equivalents	(34,147)	41,824
Cash and cash equivalents, beginning of period	46,519	4,695
Cash and cash equivalents, end of period	12,372	46,519
Supplemental disclosures:
Cash paid for interest	73	151
Cash paid for income taxes	0	0
Non-cash transactions:
Acquisition of assets included in accounts payable		$ 38