Note 10 - Stock Option Plan: Schedule of Stock Option Plan Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Details
Outstanding at beginning of year	1,625	1,470
Outstanding at beginning of year, weighted average exercise price	$ 0.88	$ 1.53
Granted	141	512
Granted, weighted average exercise price	$ 1.39	$ 0.90
Exercised	0	(175)
Exercised, weighted average exercise price	$ 0	$ 0.40
Forfeited or expired	(156)	(182)
Forfeited or expired, weighted average exercise price	$ 3.61	$ 6.59
Outstanding at beginning of year	1,610	1,625
Outstanding at beginning of year, weighted average exercise price	$ 0.66	$ 0.88
Exercisable as of end of the period	1,089	1,056
Exercisable as of end of the period, weighted average exercise price	$ 0.51	$ 0.95