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Investments in Available For Sale Marketable Debt Securities (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 65,146,438	$ 62,360,199
Unrealized Gains	561,093	665,171
Unrealized Losses	(540,658)	(701,983)
Fair Value	65,166,873	62,323,387
U.S. government and agency backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	36,121,573	31,480,482
Unrealized Gains	561,093	665,171
Fair Value	36,682,666	32,145,653
Corporate debt and certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	29,024,865	30,879,717
Unrealized Losses	(540,658)	(701,983)
Fair Value	$ 28,484,207	$ 30,177,734

X

- Definition

This item represents the cost of debt 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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Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer.

+ References

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