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v3.25.1

Note 2 - Revenue Recognition (Tables) | 6 Months Ended
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Mar. 31, 2025
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | March 31, 2025 |  |  | March 31, 2024 |  |  | March 31, 2025 |  |  | March 31, 2024 |
Smart Water |  | $ | 9,472 |  |  | $ | 6,411 |  |  | $ | 16,760 |  |  | $ | 10,645 |
Energy Solutions |  |  | 3,399 |  |  |  | 6,380 |  |  |  | 23,225 |  |  |  | 40,086 |
Intelligent Industrial |  |  | 5,837 |  |  |  | 6,706 |  |  |  | 11,368 |  |  |  | 12,480 |
Total |  | $ | 18,708 |  |  | $ | 19,497 |  |  | $ | 51,353 |  |  | $ | 63,211 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | March 31, 2025 |  |  | March 31, 2024 |  |  | March 31, 2025 |  |  | March 31, 2024 |
Asia (including Russian Federation) |  | $ | 1,811 |  |  | $ | 3,672 |  |  | $ | 19,868 |  |  | $ | 35,888 |
Canada |  |  | 626 |  |  |  | 1,002 |  |  |  | 995 |  |  |  | 2,228 |
Europe |  |  | 1,190 |  |  |  | 1,507 |  |  |  | 2,588 |  |  |  | 2,885 |
Mexico |  |  | 811 |  |  |  | 204 |  |  |  | 2,092 |  |  |  | 370 |
United States |  |  | 14,002 |  |  |  | 12,831 |  |  |  | 25,425 |  |  |  | 21,249 |
Other |  |  | 268 |  |  |  | 281 |  |  |  | 385 |  |  |  | 591 |
Total |  | $ | 18,708 |  |  | $ | 19,497 |  |  | $ | 51,353 |  |  | $ | 63,211 |

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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