2. REVENUES: ADOPTION OF ASC 606 (Details - Contract balances) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Billings In Excess Of Costs And Estimated Earnings On Uncompleted Contracts And Deferred Revenues
Costs incurred on uncompleted contracts	$ 8,749	$ 9,564
Estimated earnings on uncompleted contracts	9,019	10,741
Gross costs and estimated earnings	17,768	20,305
Less: Billings to date on uncompleted contracts	(17,356)	(19,992)
Costs incurred plus estimated earning less billings on uncompleted contracts, net	412	313
Included in the accompanying condensed consolidated balance sheets under the following captions:
Contract Assets	653	925
Contract Liabilities	(241)	(612)
Costs incurred plus estimated earning less billings on uncompleted contracts	$ 412	$ 313