Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive (Loss) Income, Balance, beginning	$ 748
Other comprehensive loss before reclassifications, net of tax	(166)
Amounts reclassified from accumulated other comprehensive income, net of tax	(19)
Net current-period other comprehensive loss, net of tax	185	$ 393
Accumulated Other Comprehensive (Loss) Income, Balance, ending	563
Pension and Postretirement Health Benefits
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive (Loss) Income, Balance, beginning	1,012
Other comprehensive loss before reclassifications, net of tax	0
Amounts reclassified from accumulated other comprehensive income, net of tax	(19)
Net current-period other comprehensive loss, net of tax	19
Accumulated Other Comprehensive (Loss) Income, Balance, ending	993
Cumulative Translation Adjustment
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive (Loss) Income, Balance, beginning	(264)
Other comprehensive loss before reclassifications, net of tax	(166)
Amounts reclassified from accumulated other comprehensive income, net of tax	0
Net current-period other comprehensive loss, net of tax	166
Accumulated Other Comprehensive (Loss) Income, Balance, ending	$ (430)