Inventories

3 Months Ended

Mar. 31, 2023

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:

	March 31, 2023	December 31, 2022
Raw material	$       4,609,907	$       4,460,071
Work-in-process	3,147,846	2,747,427
Finished goods	2,862,199	2,534,732
Inventories, gross	10,619,952	9,742,230
Valuation reserves	(621,000)	(621,000)
Inventories, net	$       9,998,952	$       9,121,230