Note 4 - Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Note 4 - Investments (Details) [Line Items]
Available-for-sale Securities, Current	$ 2,231,000		$ 1,606,000	[1]
Marketable Securities, Realized Gain (Loss)	161,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	104,000
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	338,000	47,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	155,000	28,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)	167,500
Derivative, Gain on Derivative	30,000
Marketable Securities [Member]
Note 4 - Investments (Details) [Line Items]
Available-for-sale Securities, Current	2,231,000		1,256,000
Warrant [Member]
Note 4 - Investments (Details) [Line Items]
Available-for-sale Securities, Current			$ 350,000

[1] The condensed consolidated balance sheet as of December 31, 2013 has been prepared using information from the audited consolidatedbalance sheet as of that date.