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Intangible Assets and Goodwill Definite-lived Intangibles (Details) - USD ($)
$ in Thousands
3 Months Ended
May 31, 2018
Feb. 28, 2018
Definite-Lived Intangible Assets [Line Items]    
Net Carrying Amount $ 980 $ 1,053
Contract-Based Intangible Assets    
Definite-Lived Intangible Assets [Line Items]    
Weighted average remaining useful life 3 years 4 months  
Gross Carrying Amount $ 2,154 2,154
Accumulated Amortization 1,174 1,101
Net Carrying Amount $ 980 $ 1,053