FINANCIAL INSTRUMENTS (Details) (USD $) | 6 Months Ended |
In Thousands, unless otherwise specified | Aug. 31, 2014 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | $36,844 |
Unrealized Gains (Losses) | ' |
Fair Value | 36,844 |
Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 23,296 |
Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 13,548 |
Cash [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 13,897 |
Unrealized Gains (Losses) | ' |
Fair Value | 13,897 |
Cash [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 13,897 |
Cash [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 1 [Member] | Money Market Funds [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 399 |
Unrealized Gains (Losses) | ' |
Fair Value | 399 |
Level 1 [Member] | Money Market Funds [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 1 [Member] | Money Market Funds [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 2 [Member] | U.S. Treasury Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 1,000 |
Unrealized Gains (Losses) | ' |
Fair Value | 1,000 |
Level 2 [Member] | U.S. Treasury Securities [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 2 [Member] | U.S. Treasury Securities [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 1,000 |
Level 2 [Member] | Certificates of Deposit [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 500 |
Unrealized Gains (Losses) | ' |
Fair Value | 500 |
Level 2 [Member] | Certificates of Deposit [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 2 [Member] | Certificates of Deposit [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 500 |
Level 2 [Member] | Repurchase Agreements [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 9,000 |
Unrealized Gains (Losses) | ' |
Fair Value | 9,000 |
Level 2 [Member] | Repurchase Agreements [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | 9,000 |
Level 2 [Member] | Repurchase Agreements [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 2 [Member] | Commercial Paper [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Adjusted Cost | 12,048 |
Unrealized Gains (Losses) | ' |
Fair Value | 12,048 |
Level 2 [Member] | Commercial Paper [Member] | Cash and Cash Equivalents [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | ' |
Level 2 [Member] | Commercial Paper [Member] | Short-Term Marketable Securities [Member] | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' |
Fair Value | $12,048 |