Note 5 - Property, Plant and Equipment

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

5. Property, Plant and Equipment

Property, plant and equipment consisted of the following:

	As of
	December 31, 2021			December 31, 2020
Leasehold improvements	$	2,420,028		$	2,420,028
Computer equipment		511,062			532,125
Furniture and fixtures		377,859			377,859
Operating lease right-of-use asset		3,678,647			2,944,932
		6,987,596			6,274,944
Less-accumulated depreciation		(4,621,639	)		(4,170,954	)
Property, plant and equipment, net	$	2,365,957		$	2,103,990

Depreciation and amortization expense on property, plant, and equipment was $0.5 million for each of the years ended December 31, 2021, 2020, and 2019.