2. LEASES (Details - Operating lease info) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Right of use operating lease assets	$ 3,444		$ 3,444		$ 4,334
Current lease liabilities	1,234		1,234		1,181
Non-current lease liabilities	2,247		2,247		3,180
Total lease liabilities	3,481		3,481		$ 4,361
Components of lease expense
Short term lease expense	37	$ 41	124	$ 278
Total lease expense	$ 334	408	$ 883	1,389
Weighted average remaining lease (years) terms on operating leases	2 years 8 months 12 days		2 years 8 months 12 days		3 years 3 months 11 days
Weighted average discount rates on operating leases	5.374%		5.374%		5.374%
Cost of Sales [Member]
Components of lease expense
Operating lease expense	$ 271	312	$ 659	926
Selling, General and Administrative Expenses [Member]
Components of lease expense
Operating lease expense	$ 26	$ 55	$ 100	$ 185