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Note 2 - Revenue Recognition (Tables) | 12 Months Ended
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Sep. 30, 2024
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | YEAR ENDED SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
Oil and Gas Markets |  |  |  |  |  |  |  |
Traditional exploration product revenue |  | $ | 9,666 |  |  | $ | 12,081 |
Wireless exploration product revenue |  |  | 48,094 |  |  |  | 10,168 |
Reservoir product revenue |  |  | 596 |  |  |  | 962 |
Total revenue |  |  | 58,356 |  |  |  | 23,211 |
Adjacent Markets |  |  |  |  |  |  |  |
Industrial product revenue |  |  | 43,058 |  |  |  | 36,859 |
Imaging product revenue |  |  | 12,400 |  |  |  | 12,029 |
Total revenue |  |  | 55,458 |  |  |  | 48,888 |
Emerging Markets |  |  |  |  |  |  |  |
Revenue |  |  | 2,222 |  |  |  | 1,234 |
Total |  | $ | 116,036 |  |  | $ | 73,333 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | YEAR ENDED SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
Asia (including Russian Federation) |  | $ | 43,831 |  |  | $ | 13,006 |
Canada |  |  | 1,578 |  |  |  | 1,032 |
Europe |  |  | 6,430 |  |  |  | 5,976 |
Mexico |  |  | 1,959 |  |  |  | 1,792 |
South America |  |  | 384 |  |  |  | 448 |
United States |  |  | 61,009 |  |  |  | 49,828 |
Other |  |  | 845 |  |  |  | 1,251 |
|  | $ | 116,036 |  |  | $ | 73,333 |

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