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Note 7 - Property and Equipment, Net (Tables) | 3 Months Ended
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Dec. 31, 2021
Notes Tables |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, |  |  | September 30, |
|  | 2021 |  |  | 2021 |
Office furniture and equipment |  | $ | 1,309 |  |  | $ | 1,261 |
Machinery and equipment |  |  | 1,380 |  |  |  | 1,270 |
Leasehold improvements |  |  | 2,154 |  |  |  | 2,154 |
Property and equipment, gross |  |  | 4,843 |  |  |  | 4,685 |
Accumulated depreciation |  |  | (3,022 | ) |  |  | (2,930 | )
Property and equipment, net |  | $ | 1,821 |  |  | $ | 1,755 |
Depreciation Expense [Member] |
Notes Tables |
Property, Plant and Equipment [Table Text Block] |
|  | Three Months Ended |
|  | December 31, |
|  | 2021 |  |  | 2020 |
Depreciation expense |  | $ | 96 |  |  | $ | 99 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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