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Cost of sales and expenses by their nature (Tables)

12 Months Ended

Dec. 31, 2019

Expenses by nature [abstract]

Schedule of Cost of Sales and Administration Expenses

At the years ended at December 31, 2019, 2018 and 2017, the cost of sales and administration expenses consist of the following:

	2 0 1 9			2 0 1 8					2 0 1 7

Raw materials and consumables	$	16,411,788		$	15,565,242			$		11,268,400
Electrical energy		3,303,640			2,536,387					2,123,658
Ferroalloys		2,137,671			1,973,586					1,734,914
Refractories		707,214			613,563					492,781
Oxygen		276,648			279,272					213,838
Electrodes		1,293,096			1,463,091					419,741
Gas and fuels		962,001			766,163					612,605
Labor		2,042,433			3,181,556					2,699,414
Operation materials		919,893			954,415					1,000,752
Depreciation and amortization		1,108,629			1,112,418					1,465,759
Maintenance		2,221,595			2,243,255					2,586,507
Other expenses		319,958			954,379					615,100
	$	31,704,566		$	31,643,327			$		25,233,469

	2 0 1 9			2 0 1 8					2 0 1 7

Cost of sales	$	30,067,141		$	30,563,315			$		23,994,526
Administrative expenses		1,637,425			1,080,012					1,238,943
	$	31,704,566		$	31,643,327			$		25,233,469