Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net loss	$ (26,002)	$ (32,040)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation	1,941	1,127
Amortization of intangible assets	139	1
Gain on disposal of property and equipment	11	0
Non-cash stock-based compensation expense	2,759	2,806
Gain on derivative instruments	0	(875)
Inventory write-downs	944	3,830
Non-cash deferred rent	(297)	(207)
Change in:
Accounts receivable, net	239	(888)
Costs and estimated earnings in excess of billings on uncompleted contracts	(120)	63
Inventory	688	(10,617)
Other current assets	(344)	(178)
Other assets	(12)	0
Accounts payable	(1,518)	2,384
Accrued liabilities	150	(575)
Billings in excess of costs and estimated earnings on uncompleted contracts	(31)	2
Other long-term liabilities	(330)	139
Net cash used in operating activities	(21,805)	(35,028)
Cash flows from investing activities
Sales of investment securities	0	100
Purchases of restricted investment securities	0	(305)
Decrease in restricted investment	476	0
Proceeds on sale of property and equipment	11	0
Purchases of property and equipment	(492)	(1,659)
Net cash used in investing activities	(5)	(1,864)
Cash flows from financing activities
Principal payments under capital leases	(30)	(51)
Principal payments under long-term debt	(62)	(58)
Net proceeds from issuance of common stock	11,858	12,634
Net cash provided by financing activities	11,766	12,525
Net decrease in cash and cash equivalents	(10,044)	(24,367)
Cash and cash equivalents, at beginning of period	19,413	43,025
Cash and cash equivalents, at end of period	9,369	18,658
Supplemental disclosure of cash flow information
Cash paid for interest	34	48
Supplemental schedule of non-cash investing and financing activities
Other non-cash additions to property and equipment	211	273
Issuance of common stock for prepayment of salaries	$ 212	$ 0