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Note 8 - Prepaid Maintenance Agreement (Details Textual) - USD ($) | Mar. 31, 2011 | Sep. 30, 2017 | Sep. 30, 2016
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Amortization Period of Prepaid Maintenance Agreement | 8 years |  |
Third Party Service Provider [Member] |  |  |
Prepaid Expense | $ 1,500,000 |  |
Prepaid Expense, Current |  | $ 187,500 | $ 187,500
Prepaid Expense, Noncurrent |  | $ 93,750 | $ 281,250

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