Note 9. Investments - Schedule of Contractual Maturities on Investments (Details) - USD ($)	Dec. 31, 2016	Jun. 30, 2016
Schedule of Investments [Line Items]
Available-for-sale Securities		$ 0
Certificates of Deposit
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 5,975,000
Available-for-sale Securities, Debt Maturities, Rolling Year Two	3,422,000
Available-for-sale Securities	9,397,000
Municipal Bonds
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	4,245,000
Available-for-sale Securities, Debt Maturities, Rolling Year Two	5,163,000
Available-for-sale Securities	$ 9,408,000