Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]: Revenue (Policies)	6 Months Ended
Jun. 30, 2019
Policies
Revenue

Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790

Name:	us-gaap_RevenueRecognitionPolicyTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration