Fair Value Measurements and Derivatives - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Nov. 30, 2019	Feb. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 32,156	$ 58,236
Foreign Currency Contract, Asset, Fair Value Disclosure	(200)	88
Investments, Fair Value Disclosure	2,554	2,858
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,554	2,858
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	32,156	58,236
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	2,554	2,858
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,554	2,858
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	(200)	88
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0