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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Statement of Comprehensive Income [Abstract]    
Revenues, net $ 38,464,821 $ 34,967,963
Cost of sales 25,017,051 21,125,464
Gross margin 13,447,770 13,842,499
Operating expenses:    
Selling, general and administrative 11,989,597 8,961,150
New product development 2,165,951 1,714,077
Amortization of intangibles 1,125,083 1,129,341
Gain on disposal of property and equipment 8,951 (107,280)
Total operating costs 15,289,582 11,697,288
Operating income (loss) (1,841,812) 2,145,211
Other income (expense):    
Interest expense, net (215,354) (339,446)
Other income, net (194,170) (174,838)
Total other expense, net (409,524) (514,284)
Income (loss) before income taxes (2,251,336) 1,630,927
Income tax provision 933,915 763,998
Net income (loss) (3,185,251) 866,929
Foreign currency translation adjustment 1,380,260 (72,626)
Comprehensive income (loss) $ (1,804,991) $ 794,303
Earnings (loss) per common share (basic) $ (.12) $ 0.03
Number of shares used in per share calculation (basic) 26,314,025 25,853,419
Earnings (loss) per common share (diluted) $ (.12) $ 0.03
Number of shares used in per share calculation (diluted) 26,314,025 27,469,845