Note 1 - Organization (Details Textual) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 18, 2015	Aug. 31, 2007	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	25
Minimum [Member] | Scenario, Forecast [Member]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations				$ (18,000)
Number of Subsidiaries		2
Number of Operating Segments			1		4
Cash and Cash Equivalents, at Carrying Value			$ 1,430		$ 2,385	$ 5,598	$ 5,429