Investments - Carrying Value (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Available-for-sale securities, short-term investments	$ 3,551
Available-for-sale securities, long-term investments	50
Mutual Funds - Corporate & Government Debt
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Available-for-sale securities, short-term investments	1,728
Time Deposits
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Available-for-sale securities maturities from 91-360 days, short-term investments	495
Available-for-sale securities maturities over 360 days, long-term investments	50
Fixed Income Bonds
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Available-for-sale securities maturities less than 1 year, short-term investments	$ 1,328

Available for sale securities maturities 91 To 360 days net carrying value.

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- Definition

Available for sale securities maturities over 360 days long term investments carrying value.

+ References

No definition available.

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Amortized cost of investment in debt security measured at fair value with change recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26626-111562

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (available-for-sale), classified as noncurrent.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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