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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Sep. 30, 2018
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of the share option activity under the 2005, 2009 and 2014 Plans is as follows:
|  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |
|  | 7 |  |  | 8 |  |  | 9 |  |  | 10 |  |  | 11 |  |  | 12 |  |  | 13 |  |  | 14 |  |  | 15 |  |  | 16 |  |  | 17 |  |  | 18 |  |  | 19 |
Grant date |  | January 3, |  |  | January 2, |  |  | January 2, |  |  | January 2, |  |  | January 4, |  |  | April 19, |  |  | May 16, |  |  | August 3, |  |  | January 3, |  |  | October 2, |  |  | December 22, |  |  | January 2, |  |  | March 1, |
|  | 2012 |  |  | 2013 |  |  | 2014 |  |  | 2015 |  |  | 2016 |  |  | 2016 |  |  | 2016 |  |  | 2016 |  |  | 2017 |  |  | 2017 |  |  | 2017 |  |  | 2018 |  |  | 2018 |
Options outstanding as of September 30, 2016 |  |  | 13,500 |  |  |  | 35,500 |  |  |  | 34,500 |  |  |  | 19,500 |  |  |  | 18,500 |  |  |  | 60,000 |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Number of options granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 18,000 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options exercised |  |  | (500 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (5,000 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options cancelled/expired |  |  | (13,000 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding as of September 30, 2017 |  |  | - |  |  |  | 35,500 |  |  |  | 34,500 |  |  |  | 19,500 |  |  |  | 13,500 |  |  |  | 60,000 |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | 18,000 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Number of options granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,500 |  |  |  | 8,800 |  |  |  | 29,000 |  |  |  | 20,000 |
Options exercised |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options cancelled/expired |  |  | - |  |  |  | (35,500 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding as of September 30, 2018 |  |  | - |  |  |  | - |  |  |  | 34,500 |  |  |  | 19,500 |  |  |  | 13,500 |  |  |  | 60,000 |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | 18,000 |  |  |  | 2,500 |  |  |  | 8,800 |  |  |  | 29,000 |  |  |  | 20,000 |
Options vested and exercisable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At September 30, 2017 |  |  | - |  |  |  | 35,500 |  |  |  | 34,500 |  |  |  | 19,500 |  |  |  | 13,500 |  |  |  | 60,000 |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | 18,000 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
At September 30, 2018 |  |  | - |  |  |  | - |  |  |  | 34,500 |  |  |  | 19,500 |  |  |  | 13,500 |  |  |  | 60,000 |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | 18,000 |  |  |  | 2,500 |  |  |  | 8,800 |  |  |  | 29,000 |  |  |  | 20,000 |
Weighted average fair value at the grant date (US$) |  |  | 14.5 |  |  |  | 7.6 |  |  |  | 6.5 |  |  |  | 7.5 |  |  |  | 9.0 |  |  |  | 15.4 |  |  |  | 12.4 |  |  |  | 14.4 |  |  |  | 4.0 |  |  |  | 7.7 |  |  |  | 4.4 |  |  |  | 5.1 |  |  |  | 5.1 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair value of each option granted is estimated on the date of grant using the Black-Scholes Option Pricing Model:
|  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |  |  | Tranche |
|  | 7 |  |  | 8 |  |  | 9 |  |  | 10 |  |  | 11 |  |  | 12 |  |  | 13 |  |  | 14 |  |  | 15 |  |  | 16 |  |  | 17 |  |  | 18 |  |  | 19 |
Exercise price (US$) |  |  | 25.5 |  |  |  | 14.4 |  |  |  | 12.7 |  |  |  | 14.8 |  |  |  | 13.8 |  |  |  | 20.5 |  |  |  | 16.5 |  |  |  | 20.0 |  |  |  | 20.7 |  |  |  | 16.5 |  |  |  | 8.0 |  |  |  | 9.1 |  |  |  | 8.2 |
Average risk-free interest rate |  |  | 0.4 | % |  |  | 0.37 | % |  |  | 0.76 | % |  |  | 1.07 | % |  |  | 1.73 | % |  |  | 1.79 | % |  |  | 1.75 | % |  |  | 1.55 | % |  |  | 1.94 | % |  |  | 1.94 | % |  |  | 2.26 | % |  |  | 2.25 | % |  |  | 2.58 | %
Expected option life (year) |  |  | 3 |  |  |  | 3 |  |  |  | 3 |  |  |  | 3 |  |  |  | 5 |  |  |  | 10 |  |  |  | 10 |  |  |  | 10 |  |  |  | 5 |  |  |  | 5 |  |  |  | 5 |  |  |  | 5 |  |  |  | 5 |
Volatility rate |  |  | 90.3 | % |  |  | 86.32 | % |  |  | 79.2 | % |  |  | 79.67 | % |  |  | 80.72 | % |  |  | 69.27 | % |  |  | 69.92 | % |  |  | 65.37 | % |  |  | 63.87 | % |  |  | 52.40 | % |  |  | 63.2 | % |  |  | 64.6 | % |  |  | 68.2 | %
Dividend yield |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |

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