|
Stock-Based Compensation (Details 1) (USD $)
|
3 Months Ended |
|---|---|
|
Apr. 30, 2013
|
|
| Summary of change in number of non-vested options to purchase shares of common stock | |
| Nonvested, Beginning balance, Shares | 388,500 |
| Nonvested, Beginning balance, Weighted Average Fair Value | $ 5.67 |
| Granted, Shares | 71,000 |
| Granted, Weighted Average Fair Value | $ 3.27 |
| Forfeited, Shares | |
| Forfeited, Weighted Average Fair Value | |
| Vested, Shares | (163,000) |
| Vested, Weighted Average Fair Value | $ 5.35 |
| Nonvested, Ending balance, Shares | 296,500 |
| Nonvested, Ending balance, Weighted Average Fair Value | $ 5.27 |