Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Net loss	$ (18,212)	$ (20,190)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation	1,091	741
Amortization of intangible assets	93	0
Gain on disposal of property and equipment	(7)	0
Non-cash stock-based compensation expense	1,798	2,099
Gain on derivative instruments, net	0	(429)
Inventory write-downs	944	1,872
Non-cash deferred rent	(138)	(138)
Change in:
Accounts receivable, net	432	(592)
Costs and estimated earnings in excess of billings on uncompleted contracts	5	63
Inventory	89	(7,546)
Other current assets	34	(49)
Other assets	(12)	1
Accounts payable	(1,020)	2,328
Accrued liabilities	(171)	(420)
Billings in excess of costs and estimated earnings on uncompleted contracts	(34)	(8)
Other long-term liabilities	(424)	0
Net cash used in operating activities	(15,532)	(22,268)
Cash flows from investing activities
Sales of investment securities	0	100
Purchases of restricted investment securities	0	(305)
Decrease in restricted investment	170	0
Proceeds on sale of property and equipment	7	0
Purchases of property and equipment	(195)	(1,148)
Net cash used in investing activities	(18)	(1,353)
Cash flows from financing activities
Principal payments under capital leases	(25)	(36)
Principal payments under long-term debt	(41)	(38)
Net proceeds from issuance of common stock	5,542	306
Net cash provided by financing activities	5,476	232
Net decrease in cash and cash equivalents	(10,074)	(23,389)
Cash and cash equivalents, at beginning of period	19,413	43,025
Cash and cash equivalents, at end of period	9,339	19,636
Supplemental disclosure of cash flow information
Cash paid for interest	25	33
Supplemental schedule of non-cash investing and financing activities
Other non-cash additions to property and equipment	208	686
Issuance of common stock for prepayment of salaries	$ 448	$ 0