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10. Stock-based Compensation (Tables) | 9 Months Ended
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Jun. 30, 2017
Share-based Compensation [Abstract] |
Stock option activity |
|  |  |  |  |  | Weighted |  |  | Weighted |  |  |  |
|  |  |  |  |  | Average |  |  | Average |  |  |  |
|  |  | Number of |  |  | Exercise |  |  | Remaining |  |  |  |
|  |  | Shares |  |  | Price |  |  | Contractual Life |  |  | Intrinsic Value |
| Outstanding at September 30, 2016 |  |  |  | 175,000 |  |  | $ | 11.22 |  |  |  | 3.75 |  |  | $ | 346,500 |
| Granted |  |  |  | 36,668 |  |  |  |  |  |  |  |  |  |  |  |  |
| Exercised |  |  |  | – |  |  |  |  |  |  |  |  |  |  |  |  |
| Forfeited |  |  |  | – |  |  |  |  |  |  |  |  |  |  |  |  |
| Outstanding at June 30, 2017 |  |  |  | 211,668 |  |  | $ | 13.19 |  |  |  | 3.73 |  |  | $ | 248,500 |
| Exercisable at June 30, 2017 |  |  |  | 175,000 |  |  | $ | 9.29 |  |  |  | 2.49 |  |  | $ | 248,500 |
Stock option exercise price |
Outstanding |  |  | Exercisable |
Number of |  |  | Exercise |  |  | Number of |  |  | Exercise |
Options |  |  | Price |  |  | Options |  |  | Price |
| 31,250 |  |  | $ | 5.00 |  |  |  | 31,250 |  |  | $ | 5.00 |
| 25,000 |  |  |  | 7.50 |  |  |  | 25,000 |  |  |  | 7.50 |
| 31,250 |  |  |  | 10.00 |  |  |  | 31,250 |  |  |  | 10.00 |
| 4,167 |  |  |  | 10.86 |  |  |  |  |  |  |  |  |
| 4,167 |  |  |  | 10.86 |  |  |  |  |  |  |  |  |
| 4,167 |  |  |  | 10.86 |  |  |  |  |  |  |  |  |
| 4,167 |  |  |  | 10.86 |  |  |  |  |  |  |  |  |
| 6,250 |  |  |  | 12.50 |  |  |  | 6,250 |  |  |  | 12.50 |
| 6,250 |  |  |  | 15.00 |  |  |  | 6,250 |  |  |  | 15.00 |
| 75,000 |  |  |  | 15.18 |  |  |  | 75,000 |  |  |  | 15.18 |
| 4,000 |  |  |  | 23.41 |  |  |  |  |  |  |  |  |
| 4,000 |  |  |  | 27.60 |  |  |  |  |  |  |  |  |
| 4,000 |  |  |  | 31.74 |  |  |  |  |  |  |  |  |
| 4,000 |  |  |  | 36.50 |  |  |  |  |  |  |  |  |
| 4,000 |  |  |  | 41.98 |  |  |  |  |  |  |  |  |
| 211,668 |  |  |  |  |  |  |  | 175,000 |  |  |  |  |
Non-vested share activity |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  |  | Number of |  |  | Grant-Date |
Non-vested Shares |  |  | Shares |  |  | Fair Value |
| Non-vested at September 30, 2016 |  |  |  | 6,250 |  |  | $ | 14.22 |
| Granted |  |  |  | 36,668 |  |  | $ | 17.70 |
| Vested |  |  |  | (6,250 | ) |  | $ | 14.22 |
| Non-vested at June 30, 2017 |  |  |  | 36,668 |  |  | $ | 17.70 |
Assumptions used |
Risk-free interest rate |  | 1.25%
Expected life of the options |  | 5.0 to 10.0 years
Expected volatility |  | 107%
Expected dividend yield |  | 0%

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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