4. Commitments and Contingencies (Details - Items Appearing on the Statement of Operations) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expense:
Amortization expense - Finance ROU	$ 43	$ 59
Lease expense - Operating ROU	380	433
Other expense:
Interest expense - Finance ROU	$ 2	$ 4