CASH, CASH EQUIVALENTS AND INVESTMENTS (Details) - USD ($) $ in Thousands		May 31, 2017	Feb. 28, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		$ 114,224	$ 106,161
Unrealized Gains (Losses)		425	310
Fair Value		114,649	106,471
Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		41,914	39,322
Unrealized Gains (Losses)
Fair Value		41,914	39,322
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		266	3,406
Unrealized Gains (Losses)
Fair Value		266	3,406
Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		4,689	5,429	[1]
Unrealized Gains (Losses)		413	372	[1]
Fair Value		5,102	5,801	[1]
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		296	296	[2]
Unrealized Gains (Losses)		15	(54)	[2]
Fair Value		311	242	[2]
Fair Value, Inputs, Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		43,500	24,000
Unrealized Gains (Losses)
Fair Value		43,500	24,000
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjusted Cost		23,559	33,708
Unrealized Gains (Losses)		(3)	(8)
Fair Value		23,556	33,700
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		5,413	6,043
Other Assets [Member] | Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Other Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Other Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[1]	5,102	5,801
Other Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[2]	311	242
Other Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Other Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Cash and Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		108,690	93,706
Cash and Cash Equivalents [Member] | Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		41,914	39,322
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		266	3,406
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[1]
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[2]
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		43,500	24,000
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		23,010	26,978
Short Term Marketable Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		546	6,722
Short Term Marketable Securities [Member] | Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Short Term Marketable Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Short Term Marketable Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[1]
Short Term Marketable Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	[2]
Short Term Marketable Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value
Short Term Marketable Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 546	$ 6,722

[1] The Company has a non-qualified deferred compensation plan in which certain members of management and all non-employee directors are eligible to participate. The Company informally funds its obligations under the deferred compensation plan by purchasing shares in various equity, bond and money market mutual funds that are held in a "Rabbi Trust" and are restricted for payment of obligations to plan participants. The deferred compensation plan liability is included in Other Non-current Liabilities in the accompanying consolidated balance sheets.

[2] The equity investment in a French licensee, in the form of publicly-traded common stock, is accounted for as an available-for-sale security and is valued at the quoted closing price on its market exchange. The related unrealized gains or losses are included in Accumulated Other Comprehensive Loss in the Stockholders' Equity section of the consolidated balance sheets.