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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | ---
Carrying Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | $ 12,890 | $ 21,310
Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 12,890 | 21,322
Fair Value | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 9,043 | 12,807
Fair Value | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 3,847 | 8,515
Fair Value | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Mutual Funds - Corporate & Government Debt | Carrying Value | Short-term Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 9,043 | 12,807
Mutual Funds - Corporate & Government Debt | Fair Value | Short-term Investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 9,043 | 12,807
Mutual Funds - Corporate & Government Debt | Fair Value | Short-term Investments | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 9,043 | 12,807
Mutual Funds - Corporate & Government Debt | Fair Value | Short-term Investments | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Mutual Funds - Corporate & Government Debt | Fair Value | Short-term Investments | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Fixed Income Bonds | Carrying Value | Short-term Investments | Maturities less than 1 year |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,607 | 353
Fixed Income Bonds | Carrying Value | Long-term Investments | Maturities from 1-3 years |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,441 | 3,160
Fixed Income Bonds | Fair Value | Short-term Investments | Maturities less than 1 year |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,607 | 352
Fixed Income Bonds | Fair Value | Short-term Investments | Maturities less than 1 year | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Fixed Income Bonds | Fair Value | Short-term Investments | Maturities less than 1 year | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,607 | 352
Fixed Income Bonds | Fair Value | Short-term Investments | Maturities less than 1 year | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Fixed Income Bonds | Fair Value | Long-term Investments | Maturities from 1-3 years |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,441 | 3,166
Fixed Income Bonds | Fair Value | Long-term Investments | Maturities from 1-3 years | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Fixed Income Bonds | Fair Value | Long-term Investments | Maturities from 1-3 years | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 1,441 | 3,166
Fixed Income Bonds | Fair Value | Long-term Investments | Maturities from 1-3 years | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Carrying Value | Short-term Investments | Maturities from 1-90 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 2,243
Time Deposits | Carrying Value | Short-term Investments | Maturities from 91-360 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 250 | 1,699
Time Deposits | Carrying Value | Long-term Investments | Maturities over 360 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 549 | 1,048
Time Deposits | Fair Value | Short-term Investments | Maturities from 1-90 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 2,244
Time Deposits | Fair Value | Short-term Investments | Maturities from 1-90 days | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Fair Value | Short-term Investments | Maturities from 1-90 days | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 2,244
Time Deposits | Fair Value | Short-term Investments | Maturities from 1-90 days | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Fair Value | Short-term Investments | Maturities from 91-360 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 250 | 1,703
Time Deposits | Fair Value | Short-term Investments | Maturities from 91-360 days | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Fair Value | Short-term Investments | Maturities from 91-360 days | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 250 | 1,703
Time Deposits | Fair Value | Short-term Investments | Maturities from 91-360 days | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Fair Value | Long-term Investments | Maturities over 360 days |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 549 | 1,050
Time Deposits | Fair Value | Long-term Investments | Maturities over 360 days | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 0 | 0
Time Deposits | Fair Value | Long-term Investments | Maturities over 360 days | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | 549 | 1,050
Time Deposits | Fair Value | Long-term Investments | Maturities over 360 days | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments | $ 0 | $ 0

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