Nature of Business and Summary of Significant Accounting Policies - Income Statement location (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Net sales	$ 42,933,000	$ 47,547,000	$ 86,936,000	$ 89,223,000
Cost of sales	18,444,000	22,535,000	37,831,000	41,798,000
Selling, General and Administrative Expenses
Advertising and promotion costs	916,000	696,000	1,806,000	1,457,000
Cost of sales | Shipping and Handling
Cost of sales	353,000	389,000	743,000	760,000
Sales revenue, net | Shipping and Handling
Net sales	$ 80,000	$ 103,000	$ 170,000	$ 186,000