|
Stock Purchase (Details) (USD $)
|
3 Months Ended | |||
|---|---|---|---|---|
|
Aug. 31, 2011
|
May 31, 2012
|
May 31, 2011
|
Dec. 31, 2008
|
|
| Stock Purchase | ||||
| Shares authorized to purchase | 750,000 | |||
| Cumulative number of shares repurchased | 74,684 | 0 | 0 | |
| Cost of repurchased shares, including commissions | $ 923,000 |