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Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Comprehensive Income [Abstract]
Net loss	$ (7,191,653)	$ (16,336,790)	$ (19,476,782)	$ (25,732,707)
Other comprehensive income (loss)
Foreign currency translation adjustments	206,120	98,706	(23,928)	125,854
Unrealized gains (losses) on marketable securities	(425)	587	1,356	3,210
Other comprehensive income (loss)	205,695	99,293	(22,572)	129,064
Comprehensive loss	$ (6,985,958)	$ (16,237,497)	$ (19,499,354)	$ (25,603,643)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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