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Fair Value Measurement (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Jun. 30, 2016
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mutual funds | $ 12,848 | $ 12,807
Mutual funds, fair value | 12,848 | 12,807
Held-to-maturity securities, maturities less than 1 year | 654 | 353
Held-to-maturity securities, maturities less than 1 year, fair value | 653 | 352
Held-to-maturity securities, remaining maturities from 1-3 years | 2,747 | 3,160
Held-to-maturity securities, remaining maturities from 1-3 years, fair value | 2,749 | 3,166
Held-to-maturity securities, maturities from 1-90 days | 497 | 2,243
Held-to-maturity securities, maturities from 1-90 days, fair value | 497 | 2,244
Held-to-maturity securities, maturities from 91-360 days | 1,199 | 1,699
Held-to-maturity securities, maturities from 91-360 days, fair value | 1,201 | 1,703
Held-to-maturity securities, maturities over 360 days | 798 | 1,048
Held-to-maturity securities, maturities over 360 days, fair value | 800 | 1,050
Investments | 18,743 | 21,310
Investments, fair value | 18,748 | 21,322
Fair Value Inputs Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mutual funds, fair value | 12,848 | 12,807
Investments, fair value | 12,848 | 12,807
Fair Value Inputs Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Held-to-maturity securities, maturities less than 1 year, fair value | 653 | 352
Held-to-maturity securities, remaining maturities from 1-3 years, fair value | 2,749 | 3,166
Held-to-maturity securities, maturities from 1-90 days, fair value | 497 | 2,244
Held-to-maturity securities, maturities from 91-360 days, fair value | 1,201 | 1,703
Held-to-maturity securities, maturities over 360 days, fair value | 800 | 1,050
Investments, fair value | $ 5,900 | $ 8,515

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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 + Details
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