Note 8 - Right of Use Assets and Liabilities (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
Oct. 01, 2019 |
Sep. 30, 2019 |
|
| Operating Lease, Liability, Total | $ 456,000 | $ 456,000 | ||||
| Operating Lease, Right-of-Use Asset | 454,000 | 454,000 | ||||
| Operating Lease, Weighted Average Discount Rate, Percent | 3.50% | 3.50% | 3.50% | |||
| Operating Lease, Expense | $ 100,000 | $ 100,000 | $ 200,000 | $ 100,000 | ||
| Accounting Standards Update 2016-02 [Member] | ||||||
| Operating Lease, Liability, Total | $ 636,000 | |||||
| Operating Lease, Right-of-Use Asset | $ 636,000 | |||||