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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Income Statement [Abstract]        
Revenues $ 7,690,000 $ 6,469,000 $ 13,961,000 $ 10,968,000
Cost of sales 6,648,000 4,980,000 11,581,000 8,606,000
Gross profit 1,042,000 1,489,000 2,380,000 2,362,000
Operating expenses:        
Selling and administrative 4,000,000 3,135,000 7,498,000 6,055,000
Research and development 2,088,000 1,594,000 4,055,000 3,101,000
Total operating expenses 6,088,000 4,729,000 11,553,000 9,156,000
Operating loss (5,046,000) (3,240,000) (9,173,000) (6,794,000)
Interest expense (31,000) (124,000) (34,000) (554,000)
Net loss $ (5,077,000) $ (3,364,000) $ (9,207,000) $ (7,348,000)
Net loss per share - basic and diluted $ (0.32) $ (0.29) $ (0.62) $ (0.69)
Weighted average number of common shares outstanding - basic and diluted 15,987,502 11,633,793 14,895,989 10,647,181