(4) Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Notes to Financial Statements

Schedule Of Fair Value Assets Measured On Recurring Basis

  The following table presents the Company’s assets that are measured at fair value on a recurring basis at March 31, 2013:

			Fair Value Measurements at Reporting Date Using
				Quoted Prices in				Significant
				Active Markets for		Significant other		Unobservable
				Identical Assets		Inputs		Inputs
		Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents:
Money market funds	$	5,002,654	$	5,002,654	$	—	$	—
Total cash equivalents		5,002,654		5,002,654		—		—
Marketable securities:
Corporate debt and government securities		9,805,890		—		9,805,890		—
Total marketable securities		9,805,890		—		9,805,890		—
Total assets measured at fair value	$	14,808,544	$	5,002,654	$	9,805,890	$	—

The following table presents the Company’s assets that are measured at fair value on a recurring basis at December 31, 2012:

			Fair Value Measurements at Reporting Date Using
				Quoted Prices in				Significant
				Active Markets for		Significant other		Unobservable
				Identical Assets		Inputs		Inputs
		Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents:
Money market funds	$	4,285,309	$	4,285,309	$	—	$	—
Total cash equivalents		4,285,309		4,285,309		—		—
Marketable securities:
Corporate debt and government securities		10,530,942		—		10,530,942		—
Total marketable securities		10,530,942		—		10,530,942		—
Total assets measured at fair value	$	14,816,251	$	4,285,309	$	10,530,942	$	—