3. Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Measurement Tables

Schedule of fair value measurements

As of March 31, 2015	Level 1		Level 2		Total
Bank deposits	$	414,840	$	—	$	414,840
Money market funds	2,557,000		—		2,557,000
Cash and cash equivalents	2,971,840		—		2,971,840
Corporate debt securities	5,606,453		—		5,606,453
Total	$	8,578,293	$	—	$	8,578,293

As of December 31, 2014	Level 1		Level 2		Total
Bank deposits	$	972,891	$	—	$	972,891
Money market funds	1,565,867		—		1,565,867
Cash and cash equivalents	2,538,758		—		2,538,758
Corporate debt securities	6,799,702		—		6,799,702
Commercial paper	599,934		—		599,934
Short term investments	7,399,636		—		7,399,636
Total	$	9,938,394	$	—	$	9,938,394