Income Taxes (Details - Provision for income taxes) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current tax:
Federal tax	$ 0	$ 0	$ 0
State tax	4	12	7
Foreign countries	1,672	827	275
Total current tax	1,676	839	282
Deferred tax:
Federal tax	0	(22)	(9)
State tax	0	0	(4)
Foreign countries	222	359	177
Total deferred tax	(222)	(381)	(190)
Total provision for income taxes	$ 1,454	$ 458	$ 92