|
Stock-Based Compensation (Details 2) (USD $)
|
3 Months Ended |
9 Months Ended |
12 Months Ended |
|
Apr. 30, 2013
|
Apr. 30, 2013
|
Jul. 31, 2012
|
| Additional disclosures |
|
|
|
| Weighted-average grant date fair value (in dollars per share) |
$ 0.18 |
$ 0.15 |
$ 0.18 |
| Unrecognized non-cash compensation cost |
$ 206,000 |
$ 206,000 |
$ 242,000 |
| Weighted average period for recognition of unrecognized non-cash compensation cost |
|
1 year 8 months 5 days |
10 months 21 days |
|
$0.18 - 0.42
|
|
|
|
| Stock option activity by range of exercise prices |
|
|
|
| Exercise price, low end of the range (in dollars per share) |
|
$ 0.18 |
|
| Exercise price, high end of the range (in dollars per share) |
|
$ 0.42 |
|
| Number of Shares Outstanding |
4,351,500 |
4,351,500 |
|
| Weighted Average Contractual Life |
|
6 years 11 months 8 days |
|
| Weighted Average Exercise Price, Outstanding (in dollars per share) |
$ 0.23 |
$ 0.23 |
|
| Number of Shares Exercisable |
3,060,699 |
3,060,699 |
|
| Weighted Average Remaining Contractual Life |
|
5 years 10 months 6 days |
|
| Weighted Average Exercise Price, Exercisable (in dollars per share) |
$ 0.22 |
$ 0.22 |
|