| Deferred Revenue and Changes in Deferred Revenue | Changes and balances of the Company’s deferred revenue accounts by segment are as follows:  
|  |  |  |  |  |  |  |  |  |  |  
|  |  | Three Months Ended May 31, 2025 |  
| (In thousands) |  | Water and Wastewater Resource Development |  | Land Development |  | Total |  
| Balance at February 28, 2025 |  | $ |  - |  | $ |  2,048 |  | $ |  2,048 |  
| Revenue recognized |  |  |  (11) |  |  |  (3,540) |  |  |  (3,551) |  
| Revenue deferred |  |  |  13 |  |  |  2,476 |  |  |  2,489 |  
| Balance at May 31, 2025 |  | $ |  2 |  | $ |  984 |  | $ |  986 |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  | Three Months Ended May 31, 2024 |  
|  |  | Water and Wastewater Resource Development |  | Land Development |  | Total |  
| Balance at February 29, 2024 |  | $ |  31 |  | $ |  2,605 |  | $ |  2,636 |  
| Revenue recognized |  |  |  (18) |  |  |  (4,881) |  |  |  (4,899) |  
| Revenue deferred |  |  |  - |  |  |  3,824 |  |  |  3,824 |  
| Balance at May 31, 2024 |  | $ |  13 |  | $ |  1,548 |  | $ |  1,561 |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  | Nine Months Ended May 31, 2025 |  
| (In thousands) |  | Water and Wastewater Resource Development |  | Land Development |  | Total |  
| Balance at August 31, 2024 |  | $ |  - |  | $ |  2,173 |  | $ |  2,173 |  
| Revenue recognized |  |  |  (11) |  |  |  (6,027) |  |  |  (6,038) |  
| Revenue deferred |  |  |  13 |  |  |  4,838 |  |  |  4,851 |  
| Balance at May 31, 2025 |  | $ |  2 |  | $ |  984 |  | $ |  986 |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  
|  |  | Nine Months Ended May 31, 2024 |  
| (In thousands) |  | Water and Wastewater Resource Development |  | Land Development |  | Total |  
| Balance at August 31, 2023 |  | $ |  69 |  | $ |  1,661 |  | $ |  1,730 |  
| Revenue recognized |  |  |  (164) |  |  |  (8,058) |  |  |  (8,222) |  
| Revenue deferred |  |  |  108 |  |  |  7,945 |  |  |  8,053 |  
| Balance at May 31, 2024 |  | $ |  13 |  | $ |  1,548 |  | $ |  1,561 |  |