Note 9 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Text Block [Abstract]
Income tax provision (benefit) at U.S. federal statutory rate	$ (365)	$ 791
State tax provision, (benefit), net of federal income tax	(155)	116
Change in valuation allowance attributable to operations	(298)	(3,114)
Change in effective tax rate	0	111
Stock compensation	9	30
True-up adjustments and expiration of tax carryforwards and credits	685	2,105
Other, net	(14)	(18)
Income tax provision (benefit)	$ (138)	$ 21