4. Short Term Investments (Details 1) (USD $)	Dec. 31, 2014
Amortized Cost
Due in 1 year or less	$ 6,804,123
Due in 1-2 years	601,961
Total marketable securities	7,406,084
Fair Value
Due in 1 year or less	6,798,892
Due in 1-2 years	600,744
Total marketable securities	$ 7,399,636

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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Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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