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Fair Value Measurement of Assets and Liabilities (Details 1) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	$ 47,713,909	$ 45,447,323
Gross Unrealized Gains	1,492,863	1,573,927
Gross Unrealized Losses	(440,342)	(179,040)
Estimated Fair Value	48,766,430	46,842,210
Short-term Investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	5,697,930	2,929,454
Gross Unrealized Gains	59,289	322
Gross Unrealized Losses	(75,262)	(20,882)
Estimated Fair Value	5,681,957	2,908,894
Long-term investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	42,015,979	42,517,869
Gross Unrealized Gains	1,433,574	1,573,605
Gross Unrealized Losses	(365,080)	(158,158)
Estimated Fair Value	43,084,473	43,933,316
Sovereign Debt Securities [Member] | Short-term Investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	1,776,034	1,554,448
Gross Unrealized Gains	16,721	322
Gross Unrealized Losses	(12,902)
Estimated Fair Value	1,779,853	1,554,770
Sovereign Debt Securities [Member] | Long-term investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	8,016,383	8,483,883
Gross Unrealized Gains	418,169	669,910
Gross Unrealized Losses	(44,253)
Estimated Fair Value	8,390,299	9,153,793
Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	3,921,896	1,375,006
Gross Unrealized Gains	42,568
Gross Unrealized Losses	(62,360)	(20,882)
Estimated Fair Value	3,902,104	1,354,124
Corporate Debt Securities [Member] | Long-term investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	16,296,878	16,386,974
Gross Unrealized Gains	246,235	187,946
Gross Unrealized Losses	(109,984)	(104,713)
Estimated Fair Value	16,433,129	16,470,207
Asset Backed Securities [Member] | Long-term investments [Member]
Fair value of short and long-term investments classified as available for sale securities
Gross Amortized Cost	17,702,718	17,647,012
Gross Unrealized Gains	769,170	715,749
Gross Unrealized Losses	(210,843)	(53,445)
Estimated Fair Value	$ 18,261,045	$ 18,309,316

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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