Note 4 - Investments (Tables)

9 Months Ended

Sep. 30, 2015

Notes Tables

Marketable Securities [Table Text Block]

	September 30, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Corporate debt securities	$	3,008,761	$	-	$	(1,391	)	$	3,007,370
Bank certificates of deposit		19,000,000		-		-			19,000,000
	$	22,008,761	$	-	$	(1,391	)	$	22,007,370

	December 31, 2014
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Bank certificates of deposit	$	6,750,000	$	-	$	-	$	6,750,000