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Note 11 - Debt (Details Textual) | 12 Months Ended
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Sep. 30, 2018 USD ($)
Long-term Debt, Current Maturities, Total | $ 296,594
Long-term Debt, Excluding Current Maturities, Total | 52,538
Term Loans [Member] |
Interest Expense, Debt, Total | 20,949
Genasys [Member] | Loans With Governmental Agencies [Member] |
Business Combination, Acquired Debt, Fair Value | 1,520,037
Genasys Acquisition [Member] | Loans With Governmental Agencies [Member] | Collateral Pledged [Member] | Loan with Ministry of Science and Innovation, Due February 2, 2024 [Member] |
Restricted Cash, Total | $ 279,141
Cash Pledged as Collateral, Percentage of the Original Principal Received | 66.60%

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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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