Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025	Jul. 31, 2025
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Balance, beginning			$ 969
Other comprehensive income before reclassifications, net of tax			71
Amounts reclassified from accumulated other comprehensive income, net of tax			(64)
Net current-period other comprehensive (loss) income, net of tax	$ 99	$ (190)	(7)	$ 18
Accumulated Other Comprehensive Income (Loss), Balance, ending	976		976
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, after Tax	1,141		1,141		$ 1,205
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (165)		(165)		$ (236)
Postretirement Health Benefits
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income before reclassifications, net of tax			0
Amounts reclassified from accumulated other comprehensive income, net of tax			(64)
Net current-period other comprehensive (loss) income, net of tax			64
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income before reclassifications, net of tax			71
Amounts reclassified from accumulated other comprehensive income, net of tax			0
Net current-period other comprehensive (loss) income, net of tax			$ (71)