Note 5. Income Taxes - Textuals (Details)	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 21, 2017	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	21.00%
Effective Income Tax Rate Reconciliation, Percent	24.10%	31.20%		24.70%	35.30%
Federal Blended Rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						28.10%