Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Intangible assets
Amortization expense	$ 315,000	$ 337,000	$ 361,000
Changes in intangible assets
Carrying value	13,848,000	13,848,000
Accumulated amortization	(10,561,000)	(10,246,000)
Net book value	3,287,000	$ 3,602,000
Future amortization expense
2026	297,000
2027	283,000
2028	269,000
2029	210,000
2030	$ 202,000
Weighted average remaining period	14 years 1 month 6 days	14 years 9 months 18 days
Customer relationships
Changes in intangible assets
Carrying value	$ 9,800,000	$ 9,800,000
Accumulated amortization	(9,549,000)	(9,436,000)
Net book value	251,000	364,000
Trade name
Changes in intangible assets
Carrying value	4,048,000	4,048,000
Accumulated amortization	(1,012,000)	(810,000)
Net book value	$ 3,036,000	$ 3,238,000