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Note 4 - Revenue Recognition (Tables) | 6 Months Ended
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Mar. 31, 2019
Notes Tables |
Contract with Customer, Asset and Liability [Table Text Block] |
|  | Prepaid maintenance |
|  | agreement |
Balance at September 30, 2018 |  | $ | 93,750 |
New prepaid maintenance agreements |  |  | - |
Recognition of expense as a result of performing services |  |  | (93,750 | )
Balance at March 31, 2019 |  | $ | - |
|  | Customer deposits |  |  | Deferred revenue |  |  | Total contract liabilities |
Balance at September 30, 2018 |  | $ | 199,596 |  |  | $ | 523,021 |  |  | $ | 736,054 |
New performance obligations |  |  | 951,719 |  |  |  | 601,313 |  |  |  | 1,553,032 |
Recognition of revenue as a result of satisfying performance obligations |  |  | (418,798 | ) |  |  | (521,434 | ) |  |  | (940,232 | )
Balance at March 31, 2019 |  | $ | 732,517 |  |  | $ | 602,900 |  |  | $ | 1,348,854 |
Less: non-current portion |  |  | - |  |  |  | (146,043 | ) |  |  | (146,043 | )
Current portion at March 31, 2019 |  | $ | 732,517 |  |  | $ | 456,857 |  |  | $ | 1,202,811 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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