2. REVENUES: ADOPTION OF ASC 606 (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Billings In Excess Of Costs And Estimated Earnings On Uncompleted Contracts And Deferred Revenues
Costs incurred on uncompleted contracts	$ 343	$ 9,564
Estimated earnings on uncompleted contracts	407	10,741
Gross costs and estimated earnings	750	20,305
Less: Billings to date on uncompleted contracts	(598)	19,992
Costs incurred plus estimated earning less billings on uncompleted contracts, net	152	313
Included in the accompanying condensed consolidated balance sheets under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	259	925
Billings in excess of costs and estimated earnings on uncompleted contracts	(107)	(612)
Costs incurred plus estimated earning less billings on uncompleted contracts, net	$ 152	$ 313