3. REVENUES: ADOPTION OF ASC 606 (Details - Contract balances) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Billings In Excess Of Costs And Estimated Earnings On Uncompleted Contracts And Deferred Revenues
Costs incurred on uncompleted contracts	$ 2,930	$ 9,697
Estimated earnings on uncompleted contracts	2,964	10,787
Total costs and estimated earnings on uncompleted contracts	5,894	20,484
Less: Billings to date on uncompleted contracts	(4,917)	(19,526)
Costs incurred and estimated earnings less billings on uncompleted contracts	977	958
Included in the accompanying condensed consolidated balance sheets under the following captions:
Contract Assets	1,219	1,931
Contract Liabilities	(242)	(973)
Contract assets less contract liabilities	$ 977	$ 958