Note 4 - Investments (Tables)

3 Months Ended

Mar. 31, 2014

Investments, Debt and Equity Securities [Abstract]

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

	March 31,		December 31,
	2014		2013
Cost basis	$	358,000	$	255,000
Unrealized gains included in accumulated other comprehensive income		1,493,000		1,001,000
Realized gains previously recognized as warrants		380,000		-
Fair value	$	2,231,000	$	1,256,000