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Note 4 - Revenue Recognition - Contract Asset and Contract Liabilities (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Sep. 30, 2019
Balance | $ 6,122,498 |
New performance obligations | 2,587,824 |
Recognition of revenue as a result of satisfying performance obligations | (4,550,007) |
Effect of exchange rate on deferred revenue | 5,523 |
Balance | 4,165,838 |
Less: non-current portion | (435,880) |
Current portion | 3,729,958 |
Customer Deposits [Member] |  |
Balance | 5,063,091 |
New performance obligations | 2,302,269 |
Recognition of revenue as a result of satisfying performance obligations | (4,099,364) |
Effect of exchange rate on deferred revenue |  |
Balance | 3,265,996 |
Less: non-current portion |  |
Current portion | 3,265,996 | $ 5,063,091
Deferred Revenue [Member] |  |
Balance | 1,059,407 |
New performance obligations | 285,555 |
Recognition of revenue as a result of satisfying performance obligations | (450,643) |
Effect of exchange rate on deferred revenue | 5,523 |
Balance | 899,842 |
Less: non-current portion | (435,880) | (550,885)
Current portion | $ 463,962 | $ 508,522

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