Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Trading and Available-For-Sale Investments) (Details) - USD ($) $ in Thousands	Nov. 30, 2021	Nov. 30, 2020
Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	$ 155,406	$ 97,990
Unrealized Gains	16	99
Unrealized Losses	0	0
Cash, cash equivalents and investments cost basis	157,357	105,896
Cash, cash equivalents and investments at fair value	157,373	105,995
U.S. treasury bonds
Cash, Cash Equivalents and Investments [Line Items]
Amortized Cost Basis	748	4,993
Unrealized Gains	9	58
Unrealized Losses	0	0
Fair Value	757	5,051
Corporate bonds
Cash, Cash Equivalents and Investments [Line Items]
Amortized Cost Basis	1,203	2,913
Unrealized Gains	7	41
Unrealized Losses	0	0
Fair Value	1,210	2,954
Cash
Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	130,371	79,026
Money market funds
Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	$ 25,035	$ 18,964

Cash Cash Equivalents and Investments at Fair Value

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Cash, Cash Equivalents, And Investments, Cost Basis.

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Cash Cash Equivalents And Investments [Line Items]

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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).

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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