Accounts payable and accrued expenses (Tables)

12 Months Ended

Dec. 31, 2020

Accounts payable and accrued expenses [Abstract]

Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at December 31, 2020 and 2019, are shown as follows:

	2020		2019
General expenses	$	259,151	$	212,595
Operating expenses		57,929		96,004
Purchased services		89,976		95,470
Taxes payable		38,281		37,637
Salaries and wages		924		3,256
Others		78,847		54,567
	$	525,108	$	499,529