3. REVENUES: ADOPTION OF ASC 606 (Details - Contract balances) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Billings In Excess Of Costs And Estimated Earnings On Uncompleted Contracts And Deferred Revenues
Costs incurred on uncompleted contracts	$ 1,687	$ 9,697
Estimated earnings on uncompleted contracts	2,294	10,787
Gross costs and estimated earnings	3,981	20,484
Less: Billings to date on uncompleted contracts	(3,790)	(19,526)
Costs incurred plus estimated earning less billings on uncompleted contracts, net	191	958
Included in the accompanying condensed consolidated balance sheets under the following captions:
Contract Assets	814	1,931
Contract Liabilities	(623)	(973)
Costs incurred plus estimated earning less billings on uncompleted contracts	$ 191	$ 958