Note 4. Revenue - Revenue Textuals (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Jul. 01, 2016
Accounts Receivable, Customary Payment Terms			30 days
Impairment losses (income) on Doubtful Accounts	$ 0	$ (100,000)	$ 400,000	$ (100,000)
Contract with Customer, Liability, Revenue Recognized	0	1,000,000	$ 20,900,000	20,200,000
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true/false]			true
Revenue, Practical Expedient, Financing Component [true/false]			true
Prepaid Expenses and Other Current Assets
Capitalized Contract Cost, Net	200,000		$ 200,000		$ 300,000
Other Noncurrent Assets
Capitalized Contract Cost, Net	200,000		200,000		$ 300,000
Selling and Administrative Expenses
Capitalized Contract Cost, Amortization	$ 100,000	$ 0	$ 200,000	$ 200,000
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Retained earnings cumulative effect of adoption						$ 0