Trade receivables (Tables)

12 Months Ended

Dec. 31, 2021

Trade receivables [Abstract]

Summary of Trade Receivables

Trade receivables as of December 31, 2021 and 2020, are summarized as follows:

	2021			2020
Maritime
Sludge ships	$	105,373		$	-
Shipyard		59,942			40,979
Tugboats		13,883			13,981
Parcel tankers		10,071			14,485
Offshore vessels		68,486			29,864
Bulk carrier		-			98
Ports and terminals
Shipping agencies		7,839			331
Port services		889			7,152
Commercial leases		66			106
Logistics, warehousing and other businesses
Warehousing		35,560			27,145
Repair of containers		20,705			16,204
Automotive services		1,277			1,021
Other businesses		1,267			-
Total trade receivables		325,358			151,366
Contract assets		96,023			56,215
Allowance for doubtful accounts		(20,294	)		(21,218	)
	$	401,087		$	186,363

Activity in Allowance for Doubtful Accounts

The activity in the allowance for doubtful accounts is presented below:

	2021			2020
Balance as of January 1	$	21,218		$	14,385
Impairment loss for the period		199			20,140
Receivables written off during the year		(1,123	)		-
Allowance cancelation recognized during the year		-			(13,307	)
Balance as of December 31	$	20,294		$	21,218