| Number | Average Purchase Price Per Share | |||||||
| Shares purchasable under outstanding warrants at October 1, 2011 | 320,000 | $ | 3.75 | |||||
| Stock purchase warrants issued | 205,339 | $ | 5.625 | |||||
| Stock purchase warrants exercised | – | |||||||
| Shares purchasable under outstanding warrants at September 30, 2012 | 525,339 | $ | 4.48 | |||||
| Stock purchase warrants issued | 4,200 | $ | 8.72 | |||||
| Stock purchase warrants exercised | (392,194 | ) | $ | 4.19 | ||||
| Shares purchasable under outstanding warrants at September 30, 2013 | 137,345 | $ | 5.45 | |||||