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Note 3 - Investments (Tables)

3 Months Ended

Mar. 31, 2015

Cash and Cash Equivalents [Abstract]

Marketable Securities [Table Text Block]

	March 31, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Bank certificates of deposit	$	12,500,000	$	-	$	-	$	12,500,000

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

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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