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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2022
Revenue from Contract with Customer [Abstract] |
Summary of Type of Work and Customer, Contract Revenues | The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, 2022, 2021 and 2020:
Revenues |  | 2022 |  |  |  | 2021 |  |  |  | 2020 |
Dredging: |  |  |  |  |  |  |  |  |  |  |
Capital—U.S. |  | $ | 342,461 |  |  |  | $ | 397,034 |  |  |  | $ | 336,163 |
Capital—foreign |  |  | 149 |  |  |  |  | 6,596 |  |  |  |  | 25,892 |
Coastal protection |  |  | 192,567 |  |  |  |  |  | 169,678 |  |  |  |  |  | 201,361 |
Maintenance |  |  | 98,077 |  |  |  |  | 132,551 |  |  |  |  | 148,767 |
Rivers & lakes |  |  | 15,527 |  |  |  |  | 20,290 |  |  |  |  | 21,418 |
Total revenues |  | $ | 648,781 |  |  |  | $ | 726,149 |  |  |  | $ | 733,601 |
The following table sets forth, by type of customer, the Company’s contract revenues for the years ended December 31, 2022, 2021 and 2020:
Revenues |  | 2022 |  |  | 2021 |  |  | 2020 |
Dredging: |  |  |  |  |  |  |  |  |
Federal government |  | $ | 431,705 |  |  | $ | 568,980 |  |  | $ | 582,949 |
State and local government |  |  | 207,033 |  |  |  | 118,712 |  |  |  | 85,737 |
Private |  |  | 9,894 |  |  |  | 31,861 |  |  |  | 39,023 |
Foreign |  |  | 149 |  |  |  | 6,596 |  |  |  | 25,892 |
Total revenues |  | $ | 648,781 |  |  | $ | 726,149 |  |  | $ | 733,601 |
Schedule of Accounts Receivable | Accounts receivable at December 31, 2022 and December 31, 2021 are as follows:
|  |  | 2022 |  |  |  | 2021 |
Completed contracts |  | $ | 4,682 |  |  | $ | 10,612 |
Contracts in progress |  |  | 32,546 |  |  |  | 65,415 |
Retainage |  |  | 8,226 |  |  |  | 7,490 |
|  |  | 45,454 |  |  |  | 83,517 |
Allowance for doubtful accounts |  |  | (564 | ) |  |  | (564 | )
Total accounts receivable—net |  | $ | 44,890 |  |  | $ | 82,953 |
Components of Contracts in Progress | The components of contracts in progress at December 31, 2022 and December 31, 2021 are as follows:
|  |  | 2022 |  |  |  | 2021 |
Costs and earnings in excess of billings: |  |  |  |  |  |
Costs and earnings for contracts in progress |  | $ | 262,125 |  |  | $ | 270,998 |
Amounts billed |  |  | (210,068 | ) |  |  | (240,941 | )
Costs and earnings in excess of billings for contracts in progress |  |  | 52,057 |  |  |  | 30,057 |
Costs and earnings in excess of billings for completed contracts |  |  | 14,972 |  |  |  | 10,894 |
Total contract revenues in excess of billings |  | $ | 67,029 |  |  | $ | 40,951 |
Current portion of contract revenues in excess of billings |  | $ | 65,922 |  |  | $ | 39,844 |
Long-term contract revenues in excess of billings |  |  | 1,107 |  |  |  | 1,107 |
Total contract revenues in excess of billings |  | $ | 67,029 |  |  | $ | 40,951 |
Billings in excess of costs and earnings: |  |  |  |  |  |
Amounts billed |  | $ | (95,013 | ) |  | $ | (224,381 | )
Costs and earnings for contracts in progress |  |  | 85,099 |  |  |  | 209,567 |
Total billings in excess of contract revenues |  | $ | (9,914 | ) |  | $ | (14,814 | )
Summary of Revenues and Gross Profit from Foreign Project Operations | The Company derived revenues and gross profit (loss) from foreign project operations for the years ended December 31, 2022, 2021, and 2020, as follows:
|  | 2022 |  |  | 2021 |  |  | 2020 |
Contract revenues |  | $ | 149 |  |  | $ | 6,596 |  |  | $ | 25,892 |
Costs of contract revenues |  |  | (341 | ) |  |  | (9,281 | ) |  |  | (34,529 | )
Gross profit (loss) |  | $ | (192 | ) |  | $ | (2,685 | ) |  | $ | (8,637 | )

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