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Revenue (Tables)

12 Months Ended

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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