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Summary of Significant Accounting Policies - Summary of Changes Accumulated Balances of Other Comprehensive Income (Detail) (USD $) | 3 Months Ended
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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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