Note 4 - Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	2022		2021		Estimated Useful Life (years)
Lighting patent	$	6,797,000	$	6,797,000		16
Product technology		276,080		276,080		n/a
Customer relationships		149,872		149,872		7
Capitalized software development costs		105,730		105,730		n/a
Trade names		23,664		23,664		3
Total identifiable intangible assets		7,352,346		7,352,346
Less: Accumulated amortization		2,379,370		2,280,315
Net	$	4,972,976	$	5,072,031