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Condensed Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Income Statement [Abstract]        
Net revenues $ 13,689,000 $ 11,729,000 $ 26,013,000 $ 22,387,000
Cost of revenues 3,144,000 3,047,000 5,970,000 5,374,000
Gross profit 10,545,000 8,682,000 20,043,000 17,013,000
Operating expenses        
Selling, general and administrative 8,175,000 7,254,000 17,325,000 15,243,000
Research and development 107,000 154,000 313,000 452,000
Total operating expenses 8,282,000 7,408,000 17,638,000 15,695,000
Operating income 2,263,000 1,274,000 2,405,000 1,318,000
Interest income, net 96,000 7,000 173,000 11,000
Net income before income taxes 2,359,000 1,281,000 2,578,000 1,329,000
Income tax expense 685,000 304,000 749,000 271,000
Net income $ 1,674,000 $ 977,000 $ 1,829,000 $ 1,058,000
Income per share:        
Basic $ 0.20 $ 0.12 $ 0.21 $ 0.13
Diluted $ 0.19 $ 0.11 $ 0.21 $ 0.12
Weighted-average common shares outstanding:        
Basic 8,545,120 8,442,939 8,541,254 8,442,684
Diluted 8,800,172 8,684,352 8,791,519 8,685,184