v3.26.1
SEGMENT INFORMATION (Summary of Segment Information) (Details) - USD ($)
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]    
Net sales $ 13,020,773 $ 12,624,170
Cost of goods sold 7,568,362 7,850,572
Selling, general and administrative expenses 6,964,862 6,510,721
Net loss (391,464) (874,831)
Cash and cash equivalents 3,020,840 2,807,797
Available-for-sale investments, at fair value 16,803,056  
Short term investments held-to-maturity, at amortized cost   12,879,882
Long term investments held to maturity, at amortized cost   4,000,774
Inventories 4,592,090 4,885,067
Total segment assets 36,658,764 37,184,609
Headphones and Related Accessories [Member]    
Segment Reporting Information [Line Items]    
Net sales 13,020,773 12,624,170
Cost of goods sold $ 7,568,362 $ 7,850,572
Gross profit margin 41.90% 37.80%
New product certification and compliance testing $ 54,376 $ 226,719
Legal and professional expense 1,132,874 999,359
Deferred compensation expense 235,831 133,330
Other selling general and administrative expenses 5,541,781 5,151,313
Selling, general and administrative expenses 6,964,862 6,510,721
Net loss (391,464) (874,831)
Cash and cash equivalents 3,020,840 2,807,797
Available-for-sale investments, at fair value 16,803,056  
Short term investments held-to-maturity, at amortized cost   12,879,882
Long term investments held to maturity, at amortized cost   4,000,774
Inventories 4,592,090 4,885,067
Total segment assets $ 36,658,764 $ 37,184,609