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Schedule II Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Valuation Allowances and Reserves, Bad Debt Expense and Reserve for Obsolete Inventory [Table Text Block]

		2020				2019
Bad debt expense			320,270				25,044
Reserve for obsolete inventory			266,021				127,293

Valuation Allowances and Reserves [Table Text Block]

		Balance Beginning of Year				Charges to Costs and Expenses				Deductions (1)				Balance End of Year
Year Ended December 31, 2020
Allowance for inventory obsolescence		$	665,308			$	266,021			$	(207,380	)		$	723,949
Allowance for doubtful accounts			612,434				320,270				(434,660	)			498,044
Totals		$	1,277,742			$	586,291			$	(642,040	)		$	1,221,993

Year Ended December 31, 2019
Allowance for inventory obsolescence		$	1,111,795			$	127,293			$	(573,780	)		$	665,308
Allowance for doubtful accounts			971,772				25,044				(384,382	)			612,434
Totals		$	2,083,567			$	152,337			$	(958,162	)		$	1,277,742

Valuation and Qualifying Accounts, Allowance for Credit Loss [Table Text Block]

		2020				2019
Allowance for doubtful accounts at the beginning of the period		$	612,434			$	971,772
Bad debt expense			320,270				25,044
Receivables written off during the periods			(484,265	)			(362,244	)
Effect of currency translation			49,605				(22,138	)
Allowance for doubtful accounts at the end of the period		$	498,044			$	612,434