Description of Business and Summary of Significant Accounting Policies Fair Value Tables (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Feb. 28, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 58,236	$ 51,740
Foreign Currency Contract, Asset, Fair Value Disclosure	88	(262)
Investments, Fair Value Disclosure	2,858	4,167
Equity Securities without Readily Determinable Fair Value, Amount		547
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	58,236	51,740
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	2,858	3,620
Equity Securities without Readily Determinable Fair Value, Amount		0
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	88	(262)
Investments, Fair Value Disclosure	0	0
Equity Securities without Readily Determinable Fair Value, Amount		0
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,858	3,620
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,858	3,620
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0