Note 11. Investments - Schedule of Contractual Maturities on Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Certificates of Deposit
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 9,172
Available-for-sale Securities, Debt Maturities, Rolling Year Two	4,465
Available-for-sale Securities	13,637	$ 11,850
Municipal Bonds
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	2,445
Available-for-sale Securities, Debt Maturities, Rolling Year Two	0
Available-for-sale Securities	2,445	16,508
US Treasury and Federal Agency Securities
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	23,335
Available-for-sale Securities, Debt Maturities, Rolling Year Two	2,404
Available-for-sale Securities	$ 25,739	$ 6,249