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Fair Value Measurement (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Available-for-Sale Securities
Mutual funds	$ 5,400	$ 9,043
Mutual funds, fair value	5,400	9,043
Held-to-maturity securities, maturities less than 1 year	1,627	1,607
Held-to-maturity securities, maturities less than 1 year, fair value	1,627	1,607
Held-to-maturity securities, remaining maturities from 1-3 years	709	1,441
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	709	1,441
Held-to-maturity securities, maturities from 91-360 days	251	250
Held-to-maturity securities, maturities from 91-360 days, fair value	251	250
Held-to-maturity securities, maturities over 360 days	546	549
Held-to-maturity securities, maturities over 360 days, fair value	546	549
Investments	8,533	12,890
Investments, fair value	8,533	12,890
Level 1
Available-for-Sale Securities
Mutual funds, fair value	5,400	9,043
Held-to-maturity securities, maturities less than 1 year, fair value	0	0
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	0	0
Held-to-maturity securities, maturities from 91-360 days, fair value	0	0
Held-to-maturity securities, maturities over 360 days, fair value	0	0
Investments, fair value	5,400	9,043
Level 2
Available-for-Sale Securities
Mutual funds, fair value	0	0
Held-to-maturity securities, maturities less than 1 year, fair value	1,627	1,607
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	709	1,441
Held-to-maturity securities, maturities from 91-360 days, fair value	251	250
Held-to-maturity securities, maturities over 360 days, fair value	546	549
Investments, fair value	3,133	3,847
Level 3
Available-for-Sale Securities
Mutual funds, fair value	0	0
Held-to-maturity securities, maturities less than 1 year, fair value	0	0
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	0	0
Held-to-maturity securities, maturities from 91-360 days, fair value	0	0
Held-to-maturity securities, maturities over 360 days, fair value	0	0
Investments, fair value	$ 0	$ 0

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Held-To-Maturity Securities, Debt Maturities, 91 To 360 Days, Fair Value

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Fair value of held-to-maturity debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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