BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]

	Year Ended December 31
	2021		2020
Balance at beginning of year	$	160,000	$	120,000
Additions charged to costs and expenses		155,763		185,251
Accounts written off, net of recoveries		(235,763)		(145,251)
Balance at end of year	$	80,000	$	160,000

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended December 31, 2021				Year Ended December 31, 2020
	Basic		Diluted		Basic		Diluted
Net Income	$	12,251,921	$	12,251,921	$	9,835,812	$	9,835,812
Weighted-average common shares outstanding		5,207,759		5,217,722		5,194,006		5,199,696
Net income per share	$	2.35	$	2.35	$	1.89	$	1.89

Schedule of Weighted Average Number of Shares [Table Text Block]

	Year Ended December 31, 2021				Year Ended December 31, 2020
	Basic		Diluted		Basic		Diluted
Weighted-average common shares outstanding		5,207,759		5,207,759		5,194,006		5,194,006
Potentially Dilutive RSU's		-		9,963		-		5,690
Weighted-average common shares outstanding		5,207,759		5,217,722		5,194,006		5,199,696