Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities
Net loss	$ (172,922)	$ (102,970)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	12,115	7,733
Change in fair value of warrant liabilities	2,101	5,610
Stock-based compensation	20,737	13,313
Inventory write-downs	1,420	652
Other	30
Changes in operating assets and liabilities
Accounts receivable	(11,540)	(4,575)
Inventories and operating lease vehicles	(10,831)	(22,869)
Prepaid expenses and other current assets	(1,185)	(3,109)
Other assets	(335)	(818)
Accounts payable and accrued liabilities	37,999	5,862
Deferred development compensation		(156)
Deferred revenue	(1,616)	3,374
Reservation payments	34,460	1,821
Other long-term liabilities	2,291	2,599
Net cash used in operating activities	(87,276)	(93,533)
Cash Flows From Investing Activities
Purchases of marketable securities	(64,952)
Payments related to acquisition of Fremont manufacturing facility and related assets		(58,710)
Purchases of property and equipment	(143,634)	(23,055)
Withdrawals out of (transfer into) our dedicated Department of Energy account	18,292	(88,130)
Increase in other restricted cash	(887)	(1,852)
Net cash used in investing activities	(191,181)	(171,747)
Cash Flows From Financing Activities
Proceeds from issuance of common stock in public offerings	172,410	188,842
Proceeds from issuance of common stock in private placements	59,058	50,000
Principal payments on capital leases and other debt	(225)	(233)
Proceeds from long-term debt	153,172	56,557
Proceeds from exercise of stock options and other stock issuances	7,812	741
Deferred common stock and loan facility issuance costs		(3,691)
Net cash provided by financing activities	392,227	292,216
Net increase in cash and cash equivalents	113,770	26,936
Cash and cash equivalents at beginning of period	99,558	69,627
Cash and cash equivalents at end of period	213,328	96,563
Supplemental disclosure of noncash investing activities:
Acquisition of property and equipment	$ 568	$ 2,372