Note 4 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements at Reporting Date Using
	September 30, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds	$	49,285,168	$	-	$	49,285,168	$	-
Marketable securities:
United States Treasury securities		14,999,600		14,999,600		-		-
Bank certificates of deposit		5,000,000		-		5,000,000		-
Total marketable securities	$	19,999,600	$	14,999,600	$	5,000,000	$	-

			Fair Value Measurements at Reporting Date Using
	December 31, 2013		Quoted Prices in Active Markets  for Identical Assets   (Level 1)		Significant Other Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds	$	34,266,501	$	-	$	34,266,501	$	-