Note 4 - Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	June 30,		December 31,
	2014		2013
Cost basis	$	328,000	$	255,000
Unrealized gains included in accumulated other comprehensive income		2,148,000		1,001,000
Realized gains previously recognized as warrants		380,000		-
Fair value	$	2,856,000	$	1,256,000