2. LEASES (Details - Operating Lease Expense) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Components of lease expense
Short term lease expense	$ 194	$ 309
Total lease expense	$ 1,310	$ 1,787
Weighted average remaining lease (years) terms on operating leases	2 years 5 months 5 days	3 years 3 months 11 days
Weighted average discount rates on operating leases	5.374%	5.374%
Cost of Sales [Member]
Components of lease expense
Operating lease expense	$ 977	$ 1,238
Selling, General and Administrative Expenses [Member]
Components of lease expense
Operating lease expense	$ 139	$ 240