Inventories

9 Months Ended

Sep. 30, 2020

Notes

Inventories

6.  Inventories are stated at the lower of cost or net realizable value, cost being determined by the first-in, first-out method.  A summary of inventories is as follows:

	September 30, 2020	December 31, 2019
Raw material	$       2,067,234	$       2,337,278
Work-in-process	1,500,319	1,201,099
Finished goods	1,913,253	1,869,800
Inventories, gross	5,480,806	5,408,177
Valuation reserves	(536,000)	(457,000)
Inventories, net	$       4,944,806	$       4,951,177