Summary of Common Stock Option Activity (Detail) - $ / shares |
6 Months Ended | 12 Months Ended |
|---|---|---|
May. 31, 2015 |
Nov. 30, 2014 |
|
| Options | ||
| Beginning Balance | 1,328,310 | 1,848,485 |
| Less forfeited | (20,683) | (765,175) |
| Exercised | 0 | 0 |
| Issued | 567,500 | 245,000 |
| Ending Balance | 1,875,127 | 1,328,310 |
| Stock Options exercisable | 1,072,211 | |
| Weighted Average Exercise Price | ||
| Beginning Balance | $ 4.52 | $ 4.98 |
| Less forfeited | 5.23 | 4.90 |
| Weighted Average Exercise Price, Exercised | 0 | 0 |
| Weighted Average Exercise Price, Issued | 1.89 | 2.23 |
| Ending Balance | 3.72 | $ 4.52 |
| Stock Options exercisable | $ 5.01 |