|
Basis of Presentation - Additional Information (Detail) (Service Life [Member], USD $)
|
3 Months Ended |
|---|---|
|
May 31, 2014
|
|
|
Service Life [Member]
|
|
| Change in Accounting Estimate [Line Items] | |
| Effect of change in estimate on net income | $ 136,000 |
| Increase in diluted earnings per share | $ 0.01 |