Note 13. Investments (Policies)	6 Months Ended
Dec. 31, 2019
Investments [Abstract]
Investment, Policy [Policy Text Block]	Our investment policy dictates that municipal bonds, U.S. Treasury and federal agency securities must be investment grade quality.

Disclosure of accounting policy for investment in financial asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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