PROPERTY, PLANT, AND EQUIPMENT

12 Months Ended

Dec. 31, 2021

PROPERTY, PLANT, AND EQUIPMENT

PROPERTY, PLANT, AND EQUIPMENT

5.   PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment consist of the following:

	December 31,
	2021		2020
Land	$	261,893	$	261,893
Buildings and building improvements		24,364,084		11,593,952
Production equipment		34,112,766		20,290,331
Office furniture and equipment		4,089,362		3,630,455
Construction in progress		52,681,005		21,365,915
		115,509,110		57,142,546
Accumulated depreciation		(27,583,459)		(26,326,042)
	$	87,925,651	$	30,816,504

Depreciation expense for the years ended December 31, 2021, 2020, and 2019 was $1,257,417; $832,069; and $851,673, respectively.