Note 5 - Income Taxes - Income Taxes Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Provision for income taxes at federal statutory rate	$ 638	$ 1,421
Provision for income taxes at federal statutory rate, rate	21.00%	34.00%
State income taxes, net of federal benefit		$ 17
State income taxes, net of federal benefit, rate	0.00%	0.40%
Permanent differences	$ (277)	$ 85
Permanent differences, rate	(9.10%)	2.10%
Federal Research and Development Credit		$ 41
Federal Research and Development Credit, rate		1.00%
Foreign tax rate differential	$ (437)	$ 494
Foreign tax rate differential	(14.40%)	11.80%
Foreign dividend tax	$ 309	$ 798
Foreign dividend tax, rate	10.20%	19.00%
Reduction in deferred tax asset – Reduction of corporate tax rate		$ 1,043
Reduction in deferred tax asset – Reduction of corporate tax rate, rate		24.80%
Other	$ 214	$ 66
Other, rate	10.20%	1.70%
Net expense	$ 1,415	$ 2,977
Net expense, rate	46.70%	71.20%

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign dividend tax.

No definition available.