Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Jul. 31, 2025
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Balance, beginning	$ 969
Other comprehensive income before reclassifications, net of tax	(22)
Amounts reclassified from accumulated other comprehensive income, net of tax	(22)
Net current-period other comprehensive (loss) income, net of tax	44	$ 42
Accumulated Other Comprehensive Income (Loss), Balance, ending	925
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	1,183		$ 1,205
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(258)		$ (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	(22)
Net current-period other comprehensive (loss) income, net of tax	22
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income before reclassifications, net of tax	(22)
Amounts reclassified from accumulated other comprehensive income, net of tax	0
Net current-period other comprehensive (loss) income, net of tax	$ 22