Cash Equivalents and Investments (Schedule of Estimated Fair Value of Available-for-Sale Securities) (Details) $ in Thousands |
Jun. 30, 2019
USD ($)
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|---|---|
| Cash Equivalents and Investments [Abstract] | |
| Amortized Cost, Due within one year | $ 4,001 |
| Estimated Market Value, Due within one year | $ 4,001 |
| X | ||||||||||
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. No definition available.
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| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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