Note 6 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statutory federal tax provision (benefit)	$ (172)	$ 107
State income tax benefit	(29)	(36)
Effect of foreign operations	(23)	52
FIN 48 adjustment, including federal benefit for state reserves	44	(19)
Income tax credits	(70)
Valuation allowance	789	(199)
Permanent differences	36	15
Global Intangile Low-Taxed Income Effect	80	296
Return to Provision - Credits and NOL	(240)	176
Deferred adjustments	(16)	(62)
Other	10	(4)
Income tax expense	$ 409	$ 326