Note 11. Investments - Schedule of Contractual Maturities on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Certificates of Deposit
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 9,672
Available-for-sale Securities, Debt Maturities, Rolling Year Two	2,965
Available-for-sale Securities	12,637	$ 11,850
Municipal Bonds
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	5,099
Available-for-sale Securities, Debt Maturities, Rolling Year Two	904
Available-for-sale Securities	6,003	16,508
US Treasury and Federal Agency Securities
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	15,485
Available-for-sale Securities, Debt Maturities, Rolling Year Two	7,951
Available-for-sale Securities	$ 23,436	$ 6,249