Note 8 - Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	2021		2020		Estimated Useful Life (years)
Lighting patent	$	6,797,000	$	6,797,000		16
Product technology		276,080		-		n/a
Customer relationships		149,872		-		7
Capitalized software development costs		105,730		-		n/a
Trade names		23,664		-		3
Total identifiable intangible assets		7,352,346		6,797,000
Less: Accumulated amortization		2,280,315		1,840,853
Net	$	5,072,031	$	4,956,147