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Cash, Cash Equivalents and Investments (Fair Value of Debt Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Nov. 30, 2016
Investments and Cash [Abstract]
Due in one year or less	$ 22,628	$ 21,172
Due after one year	14,657	21,546
Total	$ 37,285	$ 42,718

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- Definition

Fair value of debt securities

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No definition available.

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- Definition

Fair value of debt securities maturities after one year.

+ References

No definition available.

+ Details

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- Definition

Fair value of debt securities maturities within one year.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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