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v3.23.3

Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 208,641 | $ 192,365 | $ 171,444 | $ 126,858 | $ 162,676 | $ 135,483 | $ 127,854 | $ 106,569 | $ 699,308 | $ 532,582 |
Gross profit | 51,982 | 42,670 | 33,437 | 19,464 | 33,440 | 19,059 | 19,083 | 13,436 | 147,553 | 85,018 | $ 75,063
Net income (loss) | $ 26,436 | $ 18,454 | $ 8,473 | $ 1,162 | $ 8,739 | $ 9,061 | $ (1,217) | $ (2,846) | $ 54,525 | $ 13,737 | $ 631
Earnings (loss) per share |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 2.22 | $ 1.55 | $ 0.71 | $ 0.10 | $ 0.74 | $ 0.77 | $ (0.10) | $ (0.24) | $ 4.59 | $ 1.16 | $ 0.05
Diluted (in dollars per share) | $ 2.17 | $ 1.52 | $ 0.70 | $ 0.10 | $ 0.73 | $ 0.76 | $ (0.10) | $ (0.24) | $ 4.50 | $ 1.15 | $ 0.05
Change in contract estimates due to project cancellations | $ 1,000 | $ 1,700 | $ 1,600 |  |  |  |  |  | $ 700 |  |
Decrease in valuation allowance | $ (1,900) |  |  |  |  | $ 5,900 |  |  | (1,800) |  |
Gain on sale of non-core business |  |  |  |  |  | $ 2,000 |  |  | 0 | $ 2,006 | $ 0
Revenue recognized related to settlement of a claim for cost overruns from prior years |  |  |  |  | $ 2,500 |  |  |  | $ 70,500 |  |

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