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Note 16 - Segment Information - Segment Disclosures (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Sep. 30, 2017
Revenues | $ 7,514,068 | $ 4,129,554 | $ 23,011,082 | $ 12,813,280 | $ 23,011,082 | $ 12,813,280 |
Operating Income | (178,127) | (996,571) | 1,417,132 | (1,890,345) | 1,417,132 |  |
Depreciation and amortization | (143,469) |  |  |  | (337,200) |  |
Interest expense | (4,388) |  |  |  | (14,205) |  |
Income tax expense (benefit) | (73,749) | $ (435,726) | 2,793,590 | $ (752,969) | 2,793,590 | $ (752,969) |
Long-lived assets | 4,606,602 |  | 4,606,602 |  | 4,606,602 |  | $ 565,292
Total assets | 40,642,934 |  | 40,642,934 |  | 40,642,934 |  | 38,857,800
Intersegment Eliminations [Member] |  |  |  |  |  |  |
Revenues | 96,192 |  |  |  | 186,010 |  |
LRAD Segment [Member] |  |  |  |  |  |  |
Revenues | 7,012,430 |  |  |  | 22,094,790 |  |
Operating Income | (63,257) |  |  |  | 1,507,264 |  |
Depreciation and amortization | (62,665) |  |  |  | (187,433) |  |
Interest expense |  |  |  |  |  |  |
Income tax expense (benefit) | (73,749) |  |  |  | 2,793,590 |  |
Long-lived assets | 538,173 |  | 538,173 |  | 538,173 |  | 565,292
Total assets | 35,520,401 |  | 35,520,401 |  | 35,520,401 |  | 38,857,800
LRAD Segment [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |
Genasys Segment [Member] |  |  |  |  |  |  |
Revenues | 501,638 |  |  |  | 916,292 |  |
Operating Income | (114,870) |  |  |  | (90,132) |  |
Depreciation and amortization | (80,804) |  |  |  | (149,767) |  |
Interest expense | (4,388) |  |  |  | (14,205) |  |
Income tax expense (benefit) |  |  |  |  |  |  |
Long-lived assets | 4,068,429 |  | 4,068,429 |  | 4,068,429 |  |
Total assets | 5,122,533 |  | $ 5,122,533 |  | 5,122,533 |  |
Genasys Segment [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |
Revenues | $ 96,192 |  |  |  | $ 186,010 |  |

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