Convertible Preferred Stock and Common Stock Warrants (Schedule of liquidation preference) (Details) - USD ($)	Jun. 30, 2025	Jun. 30, 2024
Class of Stock [Line Items]
Shares Designated	50,000,000	50,000,000
Shares Outstanding	3,351,000	3,351,000
Series A Preferred [Member]
Class of Stock [Line Items]
Shares Designated	2,000,000
Shares Outstanding	1,992,000
Liquidation Value / Preference	$ 4,980,000
Series B Preferred [Member]
Class of Stock [Line Items]
Shares Designated	1,800,000
Shares Outstanding	1,359,000
Liquidation Value / Preference	$ 3,397,500