Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net revenues	$ 10,141,000	$ 8,787,000	$ 30,390,000	$ 26,287,000
Cost of revenues	2,398,000	2,086,000	7,066,000	5,913,000
Gross profit	7,743,000	6,701,000	23,324,000	20,374,000
Operating expenses
Selling, general and administrative	6,544,000	6,051,000	19,806,000	16,490,000
Research and development	336,000	407,000	1,041,000	1,396,000
Total operating expenses	6,880,000	6,458,000	20,847,000	17,886,000
Operating income	863,000	243,000	2,477,000	2,488,000
Interest income, net	6,000	10,000	21,000	29,000
Net income before income taxes	869,000	253,000	2,498,000	2,517,000
Income tax expense	224,000	29,000	576,000	555,000
Net income	$ 645,000	$ 224,000	$ 1,922,000	$ 1,962,000
Income per share:
Basic	$ 0.08	$ 0.03	$ 0.23	$ 0.23
Diluted	$ 0.07	$ 0.03	$ 0.22	$ 0.22
Weighted-average common shares outstanding:
Basic	8,454,504	8,576,523	8,485,856	8,565,839
Diluted	8,744,535	8,907,045	8,762,963	8,921,494