Note 5 - Taxes - Income Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income taxes (benefit) at U.S. statutory rate			$ (98,000)	$ (293,000)
Change in valuation allowance			201,000	363,000
State income taxes, net of federal benefit			11,000	20,000
Higher / (lower) effective taxes on earnings/losses in certain foreign countries			(103,000)	(50,000)
Foreign corporate income taxes			28,000	66,000
Other, net			(11,000)	(71,000)
	$ (21,000)	$ (62,000)	$ 28,000	$ 35,000