Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (33,491,362)	$ (22,370,447)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment	1,674,954	958,143
Amortization of intangible assets	99,228	73,339
Share-based compensation expense	9,994,589	8,561,918
Amortization of premium on investments	679,830	330,506
Amortization of discount on convertible senior notes	3,955,412
Amortization of deferred financing costs	212,078
Other	221,611	400,000
Change in operating assets and liabilities:
Accounts receivable	7,396,932	2,763,282
Inventories, net	(14,019,547)	(8,348,090)
Prepaid expenses and other current assets	(2,533,284)	(595,181)
Accounts payable	678,903	21,787
Accrued interest on convertible senior notes	1,257,812
Accrued expenses and other current liabilities	2,982,620	3,318,705
Other long-term liabilities	1,947,012
Net cash used in operating activities	(18,943,212)	(14,886,038)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of investments	(120,658,082)	(25,802,150)
Maturities of investments	55,000,000
Additions to property, plant and equipment, net	(8,528,989)	(4,053,433)
Additions to patents	(409,227)	(366,958)
Net cash used in investing activities	(74,596,298)	(30,222,541)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock		62,760,450
Payment of common stock issuance costs	(600)	(4,359,934)
Proceeds from exercise of stock options	658,723	3,266,679
Net cash provided by financing activities	658,123	61,667,195
Effect of exchange rate changes on cash and cash equivalents	(142,621)	104,978
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(93,024,008)	16,663,594
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD	192,148,312	50,834,714
CASH AND CASH EQUIVALENTS - END OF PERIOD	$ 99,124,304	$ 67,498,308