Note 1 - Nature of Operations and Summary of Significant Accounting Policies: Revenue Recognition: Schedule of Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Sales	$ 30,508	$ 32,944
Other	1,814	1,851
Contracts Accounted for under Percentage of Completion
Sales	17,653	18,248
Completed Contract
Sales	$ 11,041	$ 12,845

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration