Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Effective Income Tax Rate Reconciliation, Percent	0.00%	0.00%	0.00%	0.00%
Net Income (Loss) Attributable to Parent	$ 806	$ 529	$ 319	$ (516)