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Fair Value Measurements (Fair Value Measurements within the Fair Value Hierarchy of the Financial Assets) (Details) - USD ($) $ in Thousands | Nov. 30, 2019 | Nov. 30, 2018
--- | --- | ---
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | $ 0 | $ 5,776 | [1]
Money market funds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 9,913 | 3,810 |
State and municipal bond obligations |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 7,037 | 19,423 |
U.S. treasury bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 7,231 | 6,705 |
Corporate bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 5,158 | 8,259 |
Foreign exchange derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | (80) | (170) |
Interest Rate Swap |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | (2,054) |  |
Level 1 | Money market funds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 9,913 | 3,810 |
Level 1 | State and municipal bond obligations |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 1 | U.S. treasury bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 1 | Corporate bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 1 | Foreign exchange derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | 0 | 0 |
Level 1 | Interest Rate Swap |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | 0 |  |
Level 2 | Money market funds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 2 | State and municipal bond obligations |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 7,037 | 19,423 |
Level 2 | U.S. treasury bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 7,231 | 6,705 |
Level 2 | Corporate bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 5,158 | 8,259 |
Level 2 | Foreign exchange derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | (80) | (170) |
Level 2 | Interest Rate Swap |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | (2,054) |  |
Level 3 | Money market funds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 3 | State and municipal bond obligations |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 3 | U.S. treasury bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 3 | Corporate bonds |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial assets | 0 | 0 |
Level 3 | Foreign exchange derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | 0 | $ 0 |
Level 3 | Interest Rate Swap |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value of financial liabilities | $ 0 |  |
[1] | The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

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