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Note 20 - Segment Information (Tables) | 12 Months Ended
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Sep. 30, 2024
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | YEAR ENDED SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
Revenue: |  |  |  |  |  |  |  |
Oil and Gas Markets |  | $ | 77,455 |  |  | $ | 73,993 |
Adjacent Markets |  |  | 55,625 |  |  |  | 49,039 |
Emerging Markets |  |  | 2,222 |  |  |  | 1,234 |
Corporate |  |  | 296 |  |  |  | 243 |
|  | 135,598 |  |  | 124,509 |
Income (loss) from operations: |  |  |  |  |  |  |  |
Oil and Gas Markets |  |  | 13,134 |  |  |  | 15,759 |
Adjacent Markets |  |  | 14,152 |  |  |  | 11,490 |
Emerging Markets |  |  | (6,193 | ) |  |  | (4,003 | )
Corporate |  |  | (13,976 | ) |  |  | (11,918 | )
|  | 7,117 |  |  | 11,328 |
Depreciation and amortization expenses: |  |  |  |  |  |  |  |
Oil and Gas Markets |  |  | 13,243 |  |  |  | 14,428 |
Adjacent Markets |  |  | 860 |  |  |  | 703 |
Emerging Markets |  |  | 275 |  |  |  | 565 |
Corporate |  |  | 388 |  |  |  | 542 |
|  | 14,766 |  |  | 16,238 |
Impairment, inventory obsolescence and stock-based compensation expenses: |  |  |  |  |  |  |  |
Oil and Gas Markets |  |  | 993 |  |  |  | 2,329 |
Adjacent Markets |  |  | 221 |  |  |  | 656 |
Emerging Markets |  |  | 2,798 |  |  |  | 52 |
Corporate |  |  | 642 |  |  |  | 566 |
|  | 4,654 |  |  | 3,603 |
Interest income: |  |  |  |  |  |  |  |
Oil and Gas Markets |  |  | 315 |  |  |  | 352 |
Adjacent Markets |  |  | — |  |  |  | — |
Emerging Markets |  |  | — |  |  |  | — |
Corporate |  |  | 1,243 |  |  |  | 187 |
|  | 1,558 |  |  | 539 |
Interest expense: |  |  |  |  |  |  |  |
Oil and Gas Markets |  |  | 17 |  |  |  | 105 |
Adjacent Markets |  |  | — |  |  |  | — |
Emerging Markets |  |  | — |  |  |  | — |
Corporate |  |  | 170 |  |  |  | 29 |
|  | 187 |  |  | 134 |
Schedule of Revenue Generated by the Company's Subsidiaries [Table Text Block] |
|  | YEAR ENDED SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
United States |  | $ | 127,488 |  |  | $ | 118,017 |
Canada |  |  | 1,777 |  |  |  | 1,924 |
Russian Federation |  |  | 3,487 |  |  |  | 1,850 |
United Kingdom |  |  | 2,846 |  |  |  | 2,718 |
|  | $ | 135,598 |  |  | $ | 124,509 |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | YEAR ENDED SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
Asia (including Russian Federation) |  | $ | 51,103 |  |  | $ | 26,685 |
Canada |  |  | 2,015 |  |  |  | 2,703 |
Europe |  |  | 13,817 |  |  |  | 20,826 |
Mexico |  |  | 1,959 |  |  |  | 1,792 |
South America |  |  | 2,798 |  |  |  | 8,166 |
United States |  |  | 63,061 |  |  |  | 62,611 |
Other |  |  | 845 |  |  |  | 1,726 |
|  | $ | 135,598 |  |  | $ | 124,509 |
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] |
|  | AS OF SEPTEMBER 30, |
|  | 2024 |  |  | 2023 |
United States |  | $ | 61,487 |  |  | $ | 75,321 |
Canada |  |  | 414 |  |  |  | 575 |
Colombia |  |  | 399 |  |  |  | 442 |
Russian Federation |  |  | — |  |  |  | 543 |
United Kingdom |  |  | 528 |  |  |  | 383 |
|  | $ | 62,828 |  |  | $ | 77,264 |

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