3. REVENUE FROM CONTRACTS WITH CUSTOMERS (Details - Disaggregation of Revenue) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 2,725	$ 5,269	$ 6,330	$ 11,568
Fixed-price Contract [Member]
Revenues	2,073	2,878	3,817	6,409
Service Contracts [Member]
Revenues	$ 652	$ 2,391	$ 2,513	$ 5,159

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details