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Stock-Based Compensation (Tables)
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6 Months Ended |
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Feb. 28, 2014
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| Stock-Based Compensation [Abstract] |
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| Schedule of Stock-based Compensation Expense Recognized |
| | | Three Months Ended | | | Six Months Ended | | | | | February 28, | | | February 28, | | | February 28, | | | February 28, | | | | | 2014 | | | 2013 | | | 2014 | | | 2013 | | | Stock options | | $ | 447 | | | $ | 154 | | | $ | 867 | | | $ | 279 | | | Restricted stock grants | | | - | | | | 46 | | | | - | | | | 58 | | | Investor relations warrants | | | - | | | | 15 | | | | - | | | | 46 | | | | | $ | 447 | | | $ | 215 | | | $ | 867 | | | $ | 383 | |
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| Schedule of Employee Stock Options Granted During the Period |
| | | Three Months Ended | | | Six Months Ended | | | | | February 28, | | | February 28, | | | February 28, | | | February 28, | | | | | 2014 | | | 2013 | | | 2014 | | | 2013 | | | Number of options to purchase common shares | | | 113,000 | | | | 125,000 | | | | 263,000 | | | | 355,000 | | | Weighted average exercise price | | $ | 9.38 | | | $ | 5.65 | | | $ | 9.72 | | | $ | 4.52 | | | Term (in years) | | | 10.0 | | | | 10.0 | | | | 10.0 | | | | 10.0 | | | Vesting Period (in years) | | | 5 | | | | 5 | | | | 5 | | | | 5 | | | Fair Value (in thousands) | | $ | 711 | | | $ | 490 | | | $ | 1,725 | | | $ | 1,111 | | |
| Schedule of Assumptions Used In Valuing Stock Options |
| | | Six Months Ended | | | | | February 28, 2014 | | | February 28, 2013 | | | Expected Term | | 6.5 years | | | 6.4 years | | | Expected Volatility | | | 74 | % | | | 78.7 | % | | Risk free rate | | | 1.97 | % | | | 1.06 | % | | Expected dividend yield | | | 0.00 | % | | | 0.00 | % | | Forfeiture rate | | | 0.00 | % | | | 0.00 | % |
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| Summary of Stock Option Activity Under Stock Option and Incentive Plans |
| | | Number of Shares | | | Weighted Average Exercise Price | | | Outstanding, August 31, 2013 | | | 1,820,000 | | | $ | 4.88 | | | Granted | | | 263,000 | | | $ | 9.72 | | | Exercised | | | (16,000 | ) | | $ | 4.26 | | | Outstanding, February 28, 2014 | | | 2,067,000 | | | $ | 5.27 | |
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| Schedule of Issued and Outstanding Stock Options |
| | | Outstanding Options | | | Vested Options | | | Number of shares | | | 2,067,000 | | | | 553,000 | | | Weighted average remaining contractual life | | 8.4 years | | | 7.4 years | | | Weighted average exercise price | | $ | 5.50 | | | $ | 4.02 | | | Aggregate intrinsic value (in thousands) | | $ | 10,530 | | | $ | 3,633 | |
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| Schedule of Estimated Unrecognized Compensation Cost From Unvested Stock Options |
| | | Unvested Options at February 28, 2014 | | | Unrecognized compensation expense (in thousands) | | $ | 5,306 | | | Remaining vesting phase | | 3.5 years | | |