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Inventories
9 Months Ended
Sep. 30, 2021
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, 2021

 

December 31, 2020

Raw material

$       3,922,808   

 

$       2,245,709   

Work-in-process

2,190,572   

 

1,410,868   

Finished goods

2,239,890   

 

2,096,717   

Inventories, gross

8,353,270   

 

5,753,294   

Valuation reserves

(608,000)  

 

(600,000)  

Inventories, net

$       7,745,270   

 

$       5,153,294