Fair Value Measurements and Derivatives - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Feb. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 39,294	$ 58,236
Foreign Currency Contract, Asset, Fair Value Disclosure	(162)	88
Investments, Fair Value Disclosure	2,518	2,858
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,518	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	39,294	58,236
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	2,518	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	2,518	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	(162)	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