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Summary of Significant Accounting Policies - Summary of Changes Accumulated Balances of Other Comprehensive Income (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income to net income	$ 11,159
Net current period other comprehensive income	(5,722)
Balances as of March 31, 2014	(16,881)
Balances as of December 31, 2013	(11,159)
Balances as of December 31, 2013	(87,455,970)
Amount of gain (loss) reclassified from accumulated other comprehensive income to net income	(25,467)
Net current period other comprehensive income	(16,722,370)
Balances as of March 31, 2014	(104,178,340)
Available-for-sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive income before reclassification adjustments for gains on available for sale investments	(16,881)
Other comprehensive income before reclassification adjustments for gains on available for sale investments	(16,696,903)
Unrealized Gains on Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balances as of December 31, 2013	36,626
Amount of gain (loss) reclassified from accumulated other comprehensive income to net income	(36,626)
Net current period other comprehensive income	18,584
Balances as of March 31, 2014	55,210
Unrealized Gains on Investments [Member] | Available-for-sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive income before reclassification adjustments for gains on available for sale investments	55,210
Foreign Currency Translation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balances as of December 31, 2013	(87,481,437)
Net current period other comprehensive income	(16,735,232)
Balances as of March 31, 2014	(104,216,669)
Foreign Currency Translation [Member] | Available-for-sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive income before reclassification adjustments for gains on available for sale investments	$ (16,735,232)

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Amount before tax of increase (decrease) in accumulated in equity from transactions and other events and circumstances from non-owner sources. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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