Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Income Statement location (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Net Sales	$ 181,621,000	$ 188,820,000	$ 169,997,000
Cost of Sales	80,591,000	87,066,000	96,764,000
Selling, General and Administrative Expenses
Advertising and promotion costs	3,753,000	3,262,000	2,931,000
Cost of sales | Shipping and Handling
Cost of Sales	1,589,000	1,573,000	1,697,000
Sales revenue, net | Shipping and Handling
Net Sales	$ 419,000	$ 349,000	$ 450,000