INVENTORY AND RESEARCH AND DEVELOPMENT SUPPLIES

12 Months Ended

Dec. 31, 2021

INVENTORY AND RESEARCH AND DEVELOPMENT SUPPLIES

INVENTORY AND RESEARCH AND DEVELOPMENT SUPPLIES

9.     INVENTORY AND RESEARCH AND DEVELOPMENT SUPPLIES

	December 31,		December 31,		December 31,
	2021		2020		2019
Raw materials	$	1,381,021	$	694,043	$	500,263
Work in progress		23,855		—		—
Finished goods		75,201		145,429		118,387
	$	1,480,077	$	839,472	$	618,650
Research and development supplies	$	—	$	167,378	$	671,845

During the years ended December 31, 2021, 2020 and 2019 the Company did not write down any inventory. During the year ended December 31, 2021, $555,697 of inventory was expensed in cost of goods sold (year ended December 31, 2020 and 2019: $446,239 and $458,436).