Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (22,286,824)us-gaap_NetIncomeLoss	$ (4,543,284)us-gaap_NetIncomeLoss
Other comprehensive loss:
Unrealized gain on investment securities	70,729us-gaap_UnrealizedGainLossOnInvestments
Comprehensive loss	$ (21,216,095)us-gaap_ComprehensiveIncomeNetOfTax	$ (4,543,284)us-gaap_ComprehensiveIncomeNetOfTax

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

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Name:	us-gaap_NetIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration