Inventories (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Inventory Disclosure [Abstract]

Major components of inventories

	Jun 30, 2021		Dec 31, 2020
Raw materials	$	1,286,151	$	1,323,655
Work-in-progress		399,738		428,753
Finished goods		1,140,543		1,065,458
Reduction to LIFO cost		(1,218,604)		(1,172,891)
Total Inventories	$	1,607,828	$	1,644,975

	Dec 31, 2020		Dec 31, 2019
Raw materials	$	1,323,655	$	1,667,154
Work-in-progress		428,753		419,906
Finished goods		1,065,458		1,449,854
Reduction to LIFO cost		(1,172,891)		(1,356,378)
Total Inventories	$	1,644,975	$	2,180,536