Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Valuation And Qualifying Accounts Disclosure Table [Table Text Block]

			Additions
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions			Balance at End of Period
Year Ended December 31, 2021
Reserve for doubtful accounts	$	19,973	$	55,417	$	-		$	75,390
Reserve for inventory obsolescence		315,345		137,262		-			452,607
Reserve for product warranty		205,000		190,097		(364,714	)		30,383
Valuation allowance for deferred taxes		47,319		-		-			47,319
Reserve for uncertain tax positions	$	425,000	$	165,000	$	-		$	590,000
Year Ended December 31, 2022
Reserve for doubtful accounts	$	75,390	$	68,241				$	143,631
Reserve for inventory obsolescence		452,607		905,340					1,357,947
Reserve for product warranty		30,383		432,906		(398,289	)		65,000
Valuation allowance for deferred taxes		47,319		-		(8,319	)		39,000
Reserve for uncertain tax positions	$	590,000	$	-	$	(414,000	)	$	176,000